lipo watt hour calculator

The equation is simple. Actually, watts is the fundamental unit of power and watt-hours is the energy stored. Watt Hour to Amp Hour Conversion Calculator Amp Hour to Watt Hour Conversion Calculator This calculator converts a battery or battery packs Watt hours (Wh) rating into its Amp Hours rating. The C Rating's charge or discharge time changes proportionally to the rating. C alculator default set to 1x 10.24kWh NiFePo4 Battery! This fact is very important to keep in mind, when choosing a LiPo battery. The charge time depends on the battery chemistry and the charge current. This advanced online Battery Charge Time Calculation tool is used to calculate the maximum charge time of batteries, based on the entered information. Voltage is typically fixed for different types of batteries and depends on type of internal chemistry (alkaline, lead acid, lithium, etc. Other chemistries, such as LiFe & LiMh batteries will be different. For example, If the power in kilowatts is 50 (kW) and the time in hours is 11 (hrs. Number Conversion Decimal Fraction Conversion Temperature Conversion Weight Conversion 100Ah battery run time = available capacity / load / inverter efficiency, so. Needed voltage amount (3.7V steps): MaH select: Note that there are battery run-time calculators on the web that are very wrong. So, if you have a 60W bulb and you're trying to calculate how many watts your bulb uses in 24 hours, your equation would read 60 watts x 24 hours = 1440 watt-hours. Are you looking for lipo battery size chart? Move the sliders according to your setup. It's important to know that the battery cells don't count up for maximum current draw. E (kWh) = P (kW) x t (hr. Converting amp hours to watt hours makes it easier to compare how much energy different batteries can deliver. 1.Introduction of lipo battery charge time calculator The battery life is determined dependent on the present rating in i.Milliampere (mA) ii.Milliampere Hours (mAh) The mAh is the final limit of the battery. The Amp hour rating can be useful to know when purchasing new batteries that are rated on Amp hours. The Ultimate Off Grid Solar Power Calculator - Figure out how much solar you need. Multiply these two numbers to get the watt-hour rating (Ah V = Wh). The key is to use the watts you know to calculate the amps at the battery voltage. Adjust flying load according to your wishes. How do you calculate watt-hours? Formula: watt hours = watts hours Abbreviated: Wh = W hrs Example For example, let's say you have a 50-watt fan, and you leave it on for 3 hours one night. Apart from the cells, a discharge rate is defined by the letter 'C'. Flying load is based on type of flying and/or weight of the copter. mAh to Wh calculator Watt-hours to milliamp-hours calculation formula. plus 20%-30% cost (PCM and assembly cost ) For the No part, for battery packs that is quite thin (less than 18mm) or require high discharge current . 32,56 Wh x 3 = 97,68 Wh. 1/12 * 500 = 42 watt hours + 5.5*24 = 174 watt hours. Don't get those cables burned out by using choosing cables too thin. You can also calculate watt-hours by entering the power of the device and the time period in hours directly. Watt hours are calculated by multiplying the volts by the Amp-hours. The minimum need is based on the maximum needed current (Ampre) drawn from the LiPo. If you want to calculate watt hours over a period of time t in hours, you can simply multiply: Therefore, one watt over six hours would be six watt-hours of power. Calculate power in watthours from milliamp hour. To use the RC LiPo Battery Power & Configuration Calculator, simply use the drop down box's to select your battery pack specifications. If we talk about the Ampere, it is an electrical unit that used to calculate the actual flow towards the heap. If your lithium battery does not include a watt hour (Wh) rating on the casing you can calculate it by using the voltage and mAh or Ah capacity. Preferably, always use a LiPo low battery warner on your RC device. To determine watt hours (Wh), multiply the volts (V) by the ampere hours (Ah). For information on how this calculator works see How to calculate the Watt Hours (Wh) of a lithium battery. If not, keep in mind a maximum charge rate of 1C. RC LiPo Charger and Power Supply Calculator Watch on Max Charge Rate due to Power Supply Wattage Enter the battery capacity in mAh and Charger Wattage in watts. Don't push the LiPo. No matter how big or how small, the first step is always calculating how many watts . View example. Hi FolksI have people asking me a lot of questions about chargers and which should they get and why they need a high watt charger when the lower watt charger. Watt-hours = milliamp-hours x Volts / 1000, which means that the watt-hours are calculated by multiplying the number of milliamp-hours by the volts then dividing the result by 1000. = 2.64 minutes. :: Events :: News, Details & Links. You can now calculate as - 4.4Ah x 11.1 volts = 48.8Wh example 2: a 12 volt 50 Ah battery - 50 Ah x 12 volts = 600Wh If you need it our Lithium battery watt hour calculator will work out your results for you. The equivalent of 10000 mah is around 3.7 watt-hours or 3.7 amp-hours. 174/12 = 14.5AH/day. It's not good for you LiPo to drain it completely. A battery with a 1000mAh capacity can deliver 1 Ampere (1000mA/1000) for 1 hour. How to calculate the Watt Hours (Wh) of a lithium battery, Peukerts Law how long an amp hour battery will last under a given load, VIDEO How a zinc-carbon battery is made, VIDEO How an alkaline based battery is made, VIDEO How a nickel based battery is made, VIDEO What makes a deep cycle battery different. This quick and intuitive watt-hour calculator is a tool that allows you to convert electric charge in milliamp or amp hours to watt-hours describing energy. Most batteries cases say something like "25C to 40C" discharge rate. A LiPo battery consists of multipe cells. is rated at 96 watt hours (12 x 8 = 96). A 4S LiPo would therefore supply 14.8V. As a point of reference, the average refrigerator uses 500 kWh per year or 50kWh per month and 5000 kWh would be equal to five hundred thousand watt-hours. Calculate total work hours with lunch and breaks. For example, if you have a 300mAh battery rated at 5V, the power is 300mAh * 5V . mAh. It may be used to calculate the run duration of devices that demand a certain amount of watts or amps. ( read our article on calculating range) Once you get to 1000 watt hours, its called one-kilowatt-hour, and that's how electric car packs are measured. The Electricity Retailers dirty secrets they don't want people to know: How to make the Electricity Retailers Redundant! A 400 Watt inverter will struggle with this power. LiPo Calculator for multicopter Move the sliders according to your setup. E bat is the watt-hours of rated energy stored in the battery., V bat is the battery's rated voltage in volts, and. For more on that, I suggest to read the manual or ask your supplier. 50Ah in watt-hours = 50Ah x 12 volts = 600 watt-hours. Using the inverter calculator, indicates ~14.35 Amps DC load and then running the sizing calculator suggests that I need battery capacity of 306 . Therefore 10 lights will be 456 Watts total per hour. Don't copy this site's contents please. Example: A 12-volt battery rated to 8 Amp. Q (mAh) = 1000 E (Wh) / V (V). Don't miss our electrical power calculator. Power consumption (Watt) is not really a factor for choosing your LiPo. The watt-to-hours calculator will find the final result in various units. ), which means that the energy in Kilowatt-hours is calculated by multiplying the power in Kilowatts by the time in hours. Fill out the remaining box's for the 2nd battery pack and then hit the submit button. amps = watts / ohms. RC Charger Wattage Calculator Required Charger Wattage - RC Charger Wattage Calculator Enter the battery capacity in mAh Select other Parameters and then click Calculate! A drawn by other equipment (lights etc.). However, like watts calculator, watts, amps, volts calculator is available in the market to provide the electric detail and the tool's power consumption. Calculating the Energy Voltage. You simply divide 1,200Wh by 400W and get 3 hours. So we have 14.8V x 2.2Ah = 32,56 Wh. It's advisable to stay on or below nominal discharge level to preserve battery future life. Appliance draws 400W. By using information on this website you fully agree to the site disclaimer. How to Calculate Work Hours. The following formula is used to calculate the Rated Energy in watt-hours contained in a battery: E bat = V bat * C bat E bat = 11.4V * 2200mAh = 25.08 W h. Where. The formula for calculating watt-hours is Watts x Hours = Wh. Solution: Apply formula: Hence, the final version of the battery capacity formula looks like this: E = V Q, where: E - Energy stored in a battery, expressed in watt-hours; V - Voltage of the battery; and Q - Battery capacity, measured in amp-hours. Amp-hour calculation: 10: Total watts Daily requirements Watt-Hrs d-1: 11: Corrected for battery losses Assumes static average loss Watt-Hrs d-1: 12: System voltage DC voltage only: . The battery's nominal voltage (V); and its capacity in ampere-hours (Ah). And then of course there's using a meter. Therefore, a LiPo warner will let you know when voltage levels become lower then 20%. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). The battery's capacity is defined in mAh. V. Wh. You may need to know the watt hour (Wh) rating of a lithium battery to determine how it should be shipped or to ensure you conform to regulations regarding air travel with lithium batteries. Capacity (Amp-hours) . Here's how to calculate its total energy consumption in watt hours: 50 W 3 hrs = 150 Wh So the fan's total energy consumption that night was 150 watt hours. How fast can a Sealed Lead Acid rechargeable battery charge? mAh means milli-Ampere per hour. Say, 1200Ah x 48V 1000 Watts =12 hrs (with 40% loss at the max = 48x401000 =1.92 hrs). However, when you calculate the battery capacity of 100Ah and get 1,200Wh, you can quickly figure out how long the battery will last: You have a 1,200Wh battery. Battery specifications are at C5 Rating So, if you have 100 watts running over four hours that equals 400 WHs (100400). For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. You can convert Watt-hours to Amp-hours by dividing by the . 0.05C is the so-called C-rate, used to measure charge and discharge current. . By measuring the amount of instantaneous power consumed by an appliance and multiplying that by time in use, you can calculate the total electric charge. This will warn you when the battery is drained before it's fully empty (20%). C bat is the battery's rated capacity in Ah. If you intend to ship or you are traveling by air with lithium cells, batteries or battery packs, you will need to know their Watt-hour rating. Looking at the figures I would go up to 16AH/day for the inverter. 12 Volts x 33 Amp Hours = 396 Watt Hours or roughly 400 Wh. The same battery discharged at 0.5C provides 500mA for two hours. The battery capacity, together with the LiPo battery's discharge rate will define its maximum current output (Ampre, A). by using the watts formula, you can check and calculate the accurate electric measurements of your tool. Easy! You can also use; (Wh) = mAh x V / 1000 which abbreviates the formula utilized by the calculator in executing the conversions from milliamp-hours to watt-hours. So that's why the combination capacity/discharge rate is of such importance for selecting the right LiPo for you project. Battery capacity is typically measured in Amp-hours (Ah) or milliamp-hours (mAh), although Watt-hours (Wh) is occasionally used. This battery life calculator estimates how long a battery will last, based on nominal battery capacity and the average current that a load is drawing from it. RC Lipo Battery. How Do You Calculate Lithium Ion Battery Watt Hours? E = V I T Hopefully, you remember that amp hours are a measure of electric charge Q (the battery capacity). It is designed to calculate the maximum battery charge time for any given chargable battery, based on the entered information. How to calculate the Watt Hours (Wh) of a lithium battery, How to calculate the lithium content of a lithium battery, VIDEO What makes a deep cycle battery different. In other words, one watt-hour equals one watt of average power flow over an hour. So, a 2200mAh / 40C LiPo can only handle an Ampre draw of 88A at max. Your output will be displayed. Most LiPo vendors will tell you what the maximum charge rate of the battery is. If you want to determine what is a watt-hour, it is the total amount of generated or consumed energy over a period of time (an hour). This calculator will tell you what battery size you need. Time = 2.2/50 x 60. In short, a 100Ah 12V battery will run a 400W appliance for 3 hours. The amount of cells only determine the voltage (V) of your LiPo, as needed for your equipment. Watts to Wh calculator Enter the power in watts (W), time period in hours (h), then press the Calculate button to get the result in watt-hours (Wh). If not, then it can be measured as; Volts x ampere hours (Ah) = Watt hours Example 1: A 4,400 mAh 11.1 volt battery Divide the mAh rating by 1,000 first to get an Ah rating of 4,400/1,000 - 4.4ah. Therefore a 360 watt hour pack will get you about 18 miles. For Watt-Hours/Day, please use our kWh Calculator. This online time clock uses a standard 12-hour work clock with am and pm or a 24-hour clock for military time. A constant current draw of 20A from a 2200mAh LiPo will get you:( 2200mAh /1000) / 20A = 0.11 x 60 = 6.6 minutes flying time. Fill out the remaining boxs for the 2nd battery pack and then hit the submit button. A 36-volt 10-Ah battery pack has 360 watt hours (36 X 10 = 360). You can only change the RED cells. Number of motor (s): Maximum current (A) needed per motor: Max. To calculate the relationship between charge in amp hours and voltage in volts, the formula should be used: 1 amp hour is equal to 1000 milliamp hours, so if you want to convert watts to kilowatt-hours you can simply divide the result by 1000: Let's say you have a lithium-ion polymer battery that has 1200 mAh and a nominal voltage of 3.7 V. When we use our converter, we can directly calculate the energy of the battery in watt-hours: In this example, your battery has a capacity of 4.44 Wh. For example, if a gadget uses a 2500 mAh battery, a 10000 mah battery will last roughly 4 hours. The battery size calculator calculates the battery size in ampere-hour (Ah). When we convert amp hours to watt-hours we can better estimate how much energy can be delivered by different batteries. And you won't like your multicopter falling down from the sky suddenly either. If you don't know, leave it on the default 30%, which is quite normal. This Off-Grid Solar System Sizing Calculator helps you size the battery bank, Watts of solar power, and charge controller you need for an off-grid solar system. You may use the calculator to simply run through all the specifications for either one battery pack or two battery packs! The first step in figuring out how many solar panels you need and what size of off-grid solar power system will work for you, is to know how much energy you use on a daily basis. Then Discharging Time=Battery Capacity * Battery Volt*0.9 / Device Watt 5Ah*3.7V*0.9/10W = 1.66 hours Let's explain with more examples: for a 1800mAH 3.7v 18650 battery to power a 3.7V 10W digital device, how to calculate the running time? ), what will be the energy in Kilowatt hours? The higher voltage means that more electricity can flow in an electric device. The calculator will calculate the battery life if the Watt Hour and the battery voltage is known. Do you want to know how to calculate the power consumed by your electrical devices? One kilowatt-hour is equal to 1000 watt-hours, so in order to convert watts to kilowatt hours, you need to divide the result by 1000: If you use other units of energy, i.e., mechanical horsepower, try our power converter to convert them into watts. 1C is equal to 60mins, 2C is equivalent to 0.5h or 30mins and a 0.5C rating is equivalent to 2h or 120mins. Solution E (kWh) = 50 (kW) x 11 (hr.) Watt-hours = watts * hours = 250 watts * 5 hours = 1250 watt hours Why Convert Amp Hours to Watt Hours? Please use a special build LiPo battery charger and NO OTHER! This page is a quick run-time calculator to help you estimate the run-time based on simple assumptions. Run-Time Calculator Assumptions Batteries are 100% charged to start and will only draw down to 50% - lead acid batteries only. not 23w. Example 1: Must calculate the watt-hour capacity of a car battery having a voltage of 12 volts and capacity of 60Ah. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). View example. For milliamp hours (mAh), divide by 1000 (to get to Ah) and then multiply by the Volts. Battery 1 C Rating for Continuous Discharge. So we calculate the power capacity as Volts times Amps times hours equals capacity in Watt-Hours. Selected flying load will help you define the maximum flying time based on selected mAh capacity. youDesign by Free CSS Templates. With 90% Power efficiency for Li-ion/LiPo batteries. A drawn by other equipment (lights etc.) Example 3: Must calculate the voltage of a battery having 80mAh and 288mWh. For example, a battery rated at 1000mAh provides 1000mA for one hour if discharged at 1C rate. The calculator will calculate the missing value of the first three entries; one must be left blank. Example: Calculate the flight time, current drawn from the LiPo battery of your quadcopter and other important characteristics for your quadcopter, battery charger specifications if the maximum current per motor is 10 amps, maximum current drawn by other copter equipment is 2 amps; your drone uses a 5000 mAh 7.4 V 30C LiPo battery and the . This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). Easy enough! Should I upgrade to a Gel Battery for my trolling motor? Possibly 20AH for . On the other hand, voltage is expressed in volts (V) and describes the "pressure" that causes electricity to flow within a circuit. A 3S 2200maH 40C LiPo pack will get you this: ), while their charge in milliamp hours is printed on the side. (c) 2012 multicopter.forestblue.nl. amps = watts / volts. Average run cycle is 10 hours. For comparison, laptop batteries have energy output in the range from 22 Wh to nearly 100 Wh, depending on brand and type. How much Current is my Brushless RC Car Motor Going to Draw? The simplest formula is : I = Cr * Er or Cr = I / Er Where Er = rated energy stored in Ah (rated capacity of the battery given by the manufacturer) I = current of charge or discharge in Amperes (A) Cr = C-rate of the battery Equation to get the time of charge or charge or discharge "t" according to current and rated capacity is : t = Er / I All Rights Reserved. 12-hour clock: A 12-hour clock uses the numbers 1-12. Most of the time the Amp and the hour have already been multiplied so the equation is just Volts times Amp hour equals Watt hour. You can measure the amount of energy you consume with two simple tools: a Kill-A-Watt meter and a clock. amps = volts / ohms. There are also 24 hours in a day. V. How to calculate watt-hours To calculate the relationship between charge in amp hours and voltage in volts, the formula should be used: \rm Wh = Ah V Wh = Ah V 1 amp hour is equal to 1000 milliamp hours, so if you want to convert watts to kilowatt-hours you can simply divide the result by 1000: \rm Wh = mAh V / 1000 Wh = mAh V/1000 Using a colon is . For standard AA or AAA batteries, you do not need to use amp hours, as their rating is provided in milliampere-hours (mAh). This is usually stated on the battery itself (see Image 1). This calculator will tell you how long your battery will run. AMPS = WATTS / VOLTS Using this formula allows us to figure out a charger's maximum amperage capability for batteries of different sizes. 1 kWh = 1000 Wh. You come the right place here, below are general chart of cell and lipo battery pack, include capacity, demesions, Voltages, discharge rate, weight, width, height, height, Configuration etc. Amp hours the shortened name of ampere-hour indicates how much charge can flow through a battery per one hour. If your lithium battery does not include a watt hour (Wh) rating on the casing you can calculate it by using the voltage and mAh or Ah capacity. Enter your capacity Amp-Hours and your discharge in Amps in the form below and press the "Compute" button . Here is an example, which can be a Read more "Lipo Battery Size Chart: Dimensions . Here is the formula Battery Life = Watt Hours / ( Voltage x Current in Ampere) You may also like to check Watt Hour Vs Ampere Hour if the battery capacity has been defined as Watt Hour. Knowing the hour rate of your battery, its . Example 2: Must calculate the ampere-hours of a battery to have 100 watt-hour capacity at 7.2 volts. VIDEO How a zinc-carbon battery is made, VIDEO How an alkaline based battery is made, VIDEO How a nickel based battery is made. Different types of batteries work at a specific voltage, so comparing them only by amp hours can lead to misleading conclusions. Not only are Watt Hours a good unit of measurement for capacity, but it is also pretty universal when . milliamp-hours to watt-hours calculation The energy E(Wh) in watt-hours is equal to the electric charge Q(mAh) in milliamp-hours times the voltage V(V) in volts (V) divided by 1000: E(Wh) = Q(mAh) V(V) / 1000 So watt-hours is equal to milliamp-hours times volts divided by 1000: watt-hours = milliamp-hours volts / 1000 or Wh = mAh V / 1000 To Increase Your Run-Time: Add more batteries and/or increase battery voltage from 12V to 24V. Therefore, you can use our converter to calculate electric capacity in watt-hours for each battery and compare them. Formula is (mAh)*(V)/1000 = (Wh). Select a 2nd battery pack cell count if you want to check your wiring of two different packs. As we told earlier, the safest charge rate for LiPo batteries is 1C. First, recall the voltages of various size LiPo batteries: 2 cell LiPo = 8.4V max 3 cell LiPo = 12.6V max 4 cell LiPo = 16.8V max 6 cell LiPo = 25.2V max Battery Capacity (Ah): Application Consumption (Amps): Battery Type: Results (Hours): What size battery do I need Battery Size: I have this (app) application and I need it to run for (X) hours, what size battery will I need? They don't like to get discharged to the bottom. Why do we convert amp hours to watt-hours? Sometimes you can conclude that a battery with higher amp hours can provide much more energy, but you should always take into account the nominal voltage at which the battery is operating. Adjust flying load according to your wishes. To calculate your battery's watt hours, you'd multiply 50Ah 12V: 50 amp hours (Ah) 12 volts (V) = 600 watt hours (Wh) In this example, your battery has a capacity of 600Wh. This means that 25C is the nominal discharge rate and 40C is the maximum burst discharge rate. Espaol Franais. The 80% rule is commonly used in LiPo calculations. Check out 87 similar electromagnetism calculators , Acceleration of a particle in an electric field, Milliamp hours to watt-hours an example. Watt Hours are calculated using a similar equation when dealing with batteries. Battery 2 C Rating for Continuous Discharge, RC LiPo Battery Power & Configuration Calculator, RC Drone Max Distance and Maximum Flight time Calculator, Brushless Motor Kv Measure a Motors Kv, Understanding Electricity For RC vehicles, Measuring Electricity Voltage, Current, Power, RC Electric Boats Guide for Successful Electric Boating, RC Sailboat Controls Radio Layout, Radio Setup, LEGO Passenger Train Converted to RC using RC Hobby Grade Components ( Full Proportional control ). If you want to further convert watt-hours to joules, you can also try another of our calculators, namely the energy conversion calculator. If you need it our Lithium battery watt hour calculator will work out your results for you. If you are nitty with your energy usage, each mile you travel will cost you about 20 watt hours. The electric charge Q (mAh) in milliamp-hours (mAh) is equal to 1000 times the energy E (Wh) in watt-hours (Wh) divided by the voltage V (V) in volts (V):. Max. So milliamp-hours is equal to 1000 times watt-hours divided by volts: Or 1mA for 1000 hours. View example. A discharge of 1C draws a current equal to the rated capacity. To use theRC LiPo Battery Power & Configuration Calculator, simply use the drop down boxs to select your battery pack specifications. You can convert Watt-hours to Amp-hours by dividing by the battery's nominal voltage (V) as follows: Ah = Wh / V +More Battery Life Battery Capacity Device Consumption Battery Life Formula TIME FORMAT: Estimated Battery Life: *Based on ideal conditions. 88.000 mAh / 1000 = 88 Ampere constant discharge rate. Note: If the capacity of your battery is expressed in milliampere hours (mAh)like in the image above you will need to divide by 1,000 to calculate the ampere-hours (Ah) before multiplying. All calculations for efficiency loss will be done no matter which value you are trying to calculate. Please notice that current draw depends on your way of flying and external factors such as resistance, weight and wind. t = 1/Cr to view in hours or to view in minutes use time = 60mins / Cr (c rating) Examples of Different C Rating Calculations Insert milliamp hour (mAh) and voltage (V) and click on Calculate to obtain Watt hours (Wh). = 550 Kilowatt-hours. Most people read time using either a 12-hour clock or a 24-hour clock. Are you looking for what the best sized lipo battery for your devices? But it is for choosing the right cabling. See also: Air travel with lithium batteries Shipping lithium batteries How to calculate the lithium content of a lithium battery However.. Convert mAh to Watt hours. 456 Watts will pull ~41 amps from a 12v battery . An hour is most commonly defined as a period of time equal to 60 minutes, where a minute is equal to 60 seconds, and a second has a rigorous scientific definition. Whether you have a 2200mAh 2S pack or 10S pack, if you draw 50A it'll theoretically last 2.64 minutes. Convert Ah to watts: 12 volt deep-cycle lead-acid available capacity = 100Ah x 50% = 50Ah. An example of this would be that the Yeti 400 contains a 33 Amp Hour battery operating at 12 Volts. See total work hours in hours and minutes hh:mm format as well as decimal hours. These cells deliver approx. So a 36 volt 10-Ah pack has 360 watt hours and a 52V 10-Ah pack has 520 watt hours. The table displays calculations based on the information given. Welcome to our watt-hour calculator, which allows you to convert electric charge in milliamp hours to watt-hours expressing the electrical energy transfer (power) of the system. Or, to use the abbreviated measurement, the answer would be 1440Wh. A 100Ah battery will run a fully-loaded 100 watt inverter for = 600 / 1000/ 0.95 = 0.63 hours. The table displays calculations based on the information given. Battery Capacity (mAh) = 25 Charge Rate Current (mA) = 30. Lithium-Iron (LiFePo4) Battery Calculator Ah to kWh Battery Charge or Discharge. The power produced by the 10S pack will be 2100W. The combination of capacity and discharge rate is what you will need. 3.7 Volts. For Monthly kWh, check your monthly kilowatt-hour usage printed on your electric bills. Lithium batteries draw down further. Select a 2nd battery pack cell count if you want to check your wiring of two different packs. Example: Calculate the maximum time taken by a battery to charge by the given details. Load Voltage (Vdc) Duration (hours) Remaining charge (%) Cable size calculator AS/NZS 3008 Wire size calculator NEC Maximum demand calculator AS/NZS 3000 Parameters Load type (ampere or watt): Select the unit in which the load will be specified, ampere or watt. Therefore, 1C charge rate for battery with 5000mAh is 5A. To use our tool, you only need to go through a few steps: You can also convert watts to kilowatt-hours. And a 2C charge rate would be of this double or 10 A. 2200mAh x 40C = 88.000 mAh discharge rate Enter numbers such as 1215 for 12:15 or 137 for 1:37. Watts to Wh calculation Power in watts (W) Time period in hours E(Wh) = P(W) t(h) The energy E in watt-hours (Wh) is equal to the power P in watts (W), multiplied by the time period t in hours (h). Convert mAh to Watt hours. You have to divide your LiPo pack capacity (mAh) by 1000 in order to convert from mA to A. More specifically, it is an electric charge in a battery that enables 1 ampere of current to flow for one hour. The power and configuration calculator has been created to assist models in making sure they have all the information they require to purchase application matching battery packs. To calculate the watt hours (WH) of a battery pack, simply multiply the voltage by the amp hours (Ah) of the pack. If not, you can calculate it as Volts x amp hours (Ah). Just specify: Our watt hour calculator allows you to use electric charge in milliamp or amp hours and voltage in volts to calculate the energy in watt-hours or joules. So, a 4000mAh LiPo can be charged at a maximum rate of 4000mAh / 1000 = 4A. hours. You can use the numbers printed on a battery to calculate a number for its capacity in Wh if its not already there. This results in 5000mAh/1000 = 5 Ah. For the Yes part, for battery packs that draw working current less than 5A (like power banks), you can calculate the cost by about 1.5 USD/2.6Ah Chinese 18650 battery cell, 2USD/2.6Ah Korea cells. The power produced by the 2S pack will be 370W. Here's the equation: (total number of watts) x (total number of hours) = watt-hours. There are ohms calculators online you can use and you only need to enter two values and it figures out the rest for you also there is an app that you can use where you pick out every detail of the build (they show you photos of coils and you touch the one you made) what gauge how many wraps etc. Not all brands say something about the peak discharge rate on the battery itself. Dec 20, 2013, 02:17 AM. For information on how this calculator works see How to calculate the Watt Hours (Wh) of a lithium battery. Normally the watt hours of battery is stated on the battery itself. Overcharging can cause your LiPo to catch fire and burn your belongings to Kingdom Come. For NiFe, for example, using Solar this could typically be <65% of the Ah rating for 4~6 hours. 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