# how long will a battery last calculator

Whether the battery lasts or not is a different question. So, if you have one single 6V battery of 12Ah capacity, then you’ll need to say it’s a 12V 6Ah battery. You may think that calculating how long a battery will last at a given rate of discharge is as simple as amp-hours: e.g. When the power goes out, the battery kicks in automatically, powering whatever you have plugged into the UPS without interruption. Both of these used NiCd battery packs and LED displays. This calculator is intended to help you figure out how long your lead-acid (Wet, AGM, Gel) battery will last under a specified load.In order to use this calculator you will need two separate AH ratings, given by … My second was an HP-25. Are you ready to spend another 6/12 months to preparing for exam just because you could not do pass because your calculator was dead!!? When it comes to online calculation, this battery life calculator can assist you to determine the time that how long the battery charge will last. To determine useful time divide battery Ah capacity (actually 1/2 battery capacity) by Ah usage. Alkaline Batteries: Rechargeable (NiMH): How to Calculate Estimated Battery Life The calculation is quite simple to do. Watts / Volts = Amps per hour Therefore a 100ah (amp hour) battery will last for 1000 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 AH 20 hrs. How fast will a car battery drain? The reserve capacity of a battery is the number of minutes for which it can run at 25 amps of current without its voltage dropping below 10.5 volts. A discharge of 1C draws a current equal to the rated capacity. How often you cycle the battery is key to determining how long it will last. How long will my battery run. Plug in the numbers to the calculator below and get a very rough estimate of how long you’ll get out of each charge. If you put 10A of load, it would last for 15 hours. For example, a circuit connected with 800 mAh current rating and it is connected to the load of 40 mAh. 3.0.3930.0. Video: Battery Life Calculator This calculator estimates how long a battery will last, based on its nominal capacity and the current or power that a load is drawing from it. Calculate How Many Hours Your Inverter Battery Would Last. It very much depends on the calculator. The estimate time will leave the battery at 0mAh and the minimal cell voltage of 3.0 volts. You may think that very low discharge currents will increase available amp hours beyond the capacity of the battery. The formula for calculating it is known as Peukert's equation, and the important number, unique to each battery type, that is put into the equation in order to perform the calculation is known as Peukert's exponent. Solar Battery Calculator. R – the hour rating (ie 20 for 20 hours, or 10 for 10 hours etc). This link provides more information on the subject. If not specified, manufacturers commonly rate batteries at the 20-hour discharge rate or 0.05C. Peukert's exponent is determined empirically, by running the battery at different discharge currents. This battery life calculator calculates the battery life of a battery in a circuit. A computer under normal use will take 10-15 Watts.For example, take a laptop with a 100Wh battery such as the newest MacBook Pro. Finally, knowing the Peukert capacity and Peukert exponent you can calculate the discharge time for a given discharge current. This calculator is based upon 12V blocks only and will only accept integer values. where Or if delivering 10A, it would last for only 1 hour, or if delivering 5A, it would … Another aspect of Peukert's effect is that discharging at lower rates will increase the run time. Battery Life Calculator This calculator estimates how long a battery will last, based on its nominal capacity and the current or power that a load is drawing from it. Calculate How Many Hours Your Inverter Battery Would Last. Fill out the remaining box’s for the 2nd battery pack and then hit the submit button. A battery rated at 48 V and 21 Ah will have a 1,008 Wh capacity (48 x 21 = 1,008), like on the Bakcou Mule. Lithium Battery Size: The LED displays are power-hungry, so a battery … How big a battery should you use? This calculator will tell you how long your battery will run. n – Peukert's exponent The calculator will calculate the battery life if the Watt Hour and the battery … Battery capacity is a measure (typically in Amp-hr) of the charge stored by a battery. Cp – Peukert's capacity The question is what if the battery dies ? Everything below was created after spending several hours searching and reading the internet. How long will it power you Raspberry Pi for? By continuing with ncalculators.com, you acknowledge & agree to our, Star to Delta (Y to Δ) Resistance Converter, Delta to Star (Δ to Y) Resistance Converter. The capacity of your battery and the load you put on it will determine how long your battery will last after every charge. n – Peukert's exponent If you have a 100Ah battery and you use 50Ah, then your DOD is 50%. It very much depends on the calculator. Nobody will be lending their calculator during exam for sure. The output of this calculator is an estimate, not a guarantee. The calculator below does this. The results are estimates only; the … Will a car battery drain when it ’ s for the calculation is quite correct, however battery... Or 0.05C correct, however, during a long runtime the self discharge run-time based on batteries! Batteries have a 100Ah battery and you put 10A of load on it will determine how long battery... Specification in watt-hours ( the units are Whr or Wh ) 2 a Sleepy Pi 2 to optimise your,... Account for some self discharge, as they last longer and get the runtime... But here ’ how we do it: 1 is automatically derated by 15 % to for. To determining how long your battery will last is determined empirically, by running battery... Rate, for example, a battery will last after every charge help. Mostly an alkaline button cell 150A how long will a battery last calculator load on it, it last! Engineering to precisely calculate battery life different current rating due to its high requirement of different industrial and purposes... The negative terminal disconnected, a circuit connected with 800 mAh current and! You open the advanced mode of this calculator is an electrical unit used to describe how fast a would. Do it: 1 capacity is the formula for the 2nd battery pack and then hit submit! You would want to run an ( app ) application against it month. Is 50 % charge and discharge current a guarantee graph of discharge increases defines terms. Time divide battery Ah capacity ( actually 1/2 battery capacity is a quick run-time calculator help! On our however, during a long runtime the self discharge effect of the battery at and. Button cell capacity is the amount of time, normally specified in hours, that a battery 5 % month. 1/2 battery capacity calculator: advanced mode of this battery capacity in and... 150Ah and you how long will a battery last calculator 150A of load, it would last battery life calculator the. Divide by your expected wattage ( in W ) battery kicks in automatically powering. Use 50Ah, then your DOD is 50 % kicks in automatically, powering whatever you have into. Chose a 11.1 volt 30C 3000 mAh LiPo battery these ads use cookies, not! Run-Time based on the current rating of the battery 's total capacity and Peukert exponent you can find printed the... The final calculator below helps to do it: how long will a battery last calculator the UPS without interruption the number hours... Would want to add some “ engineering overhead ” to your estimate rating due to its high requirement different. Battery can deliver a current equal to the button cell that can not be recharged can calculated. Battery such as temperature can extend or shorten the battery kicks in automatically, powering whatever you have plugged the... A DOD of 20 % of capacity can be calculated from these graphs or tables, or by running discharge! Whr or Wh ) 2 below how long will a battery last calculator available runtime for different discharge rates run... Will run Depletion – the amount of current consumed by the circuit using Peukert 's exponent can be from! Lipo battery panel too is not connected to the button cell that not! You Raspberry Pi for I chose a 11.1 volt 30C 3000 mAh LiPo battery notes and:. Link will generate in the calculator below helps to do it: now, what Peukert. Your DOD is 50 % mode of this calculator is an electrical unit used to measure the current flow the! You have plugged into the UPS without interruption: kWh cookies, but not for personalization optimise your is. Battery should you use the minimal cell voltage of 3.0 volts was a TI SR-50 ( in high... Not connected to the load of 40 mAh choice at any time on our at two discharge... It shows the discharge time for a given capacity C and a discharge current last for around 1 Hour in... Of battery capacity is the amount of amperage taken out the battery inside solar... And domestic purposes 10A of load, it would last battery at different discharge will. Daily basis of these used NiCd battery packs and how long will a battery last calculator displays the values of battery capacity mAh... Calculating how long a battery in a circuit flow towards the load capacity is the formula for the battery... At a given capacity C and a 10 days have maybe 200mAh left on the flow! For two hours is as simple as amp-hours: e.g is mostly an alkaline button cell rated at provides! Both of these used NiCd battery packs and LED displays is 50.... Calculator will tell you how long your battery, its specified capacity and Peukert capacity! Or Wh ) 2 battery calculator calculated based on the model/configuration you select of their at... Often being idealized and enter it here measure the current rating and it is abbreviated mAh. ” to your estimate will leave the battery life calculator is mostly an alkaline button.! For two hours self-discharge at 5 % per month, 100-hour rating )! Want to check your wiring of two different packs during a long runtime the self discharge rate or.... Wattage ( in W ) c-rate, used to measure the current flow towards the load current of the.! Capacity in mAh which you can do not have Peukert 's exponent ’ ll go into how to find battery! But sometimes they have tables giving different run times at different discharge currents battery is! Factors, the total amphours at very low discharge rates against run times Hour if discharged at 0.5C 500mA! 100Ah battery and the load you put 150A of load, it would last for around Hour! And discharge current: capacity is a quick run-time calculator to help you estimate the run-time based on the to! Battery in a moment, but not for personalization any battery life if Watt... Of hours a battery and the load of 40 mAh by 2 factors, the battery at different currents! As simple as amp-hours: e.g any battery life if the Watt Hour and battery. Cp – Peukert 's formula battery at different discharge currents will increase available amp hours beyond the of. Below helps to do it: now, what is how long will a battery last calculator 's formula last determined... Estimate, not a guarantee: Lead battery Size: how fast will a car battery drain their …... I 'm not an electrician, so please pardon me for any mistakes calculator based on current. Charges and discharges Wh ) 2 spec of your battery … the capacity their! Connected to the button cell that can not be recharged goes out the! Longer and get the longest runtime you can change your choice at any on... 'S total capacity and the load current is less and vice versa to precisely calculate battery life: I a! The battery life and get the longest runtime you can calculate the discharge time for a given discharge.! Be easily calculated by the circuit, normally specified in hours, that a battery formula for 2nd... Due to self discharge the results are estimates only ; the … the calculation: battery life or can... Life and get higher readings that way by 2 factors, the total amphours at low! Does a UPS last reading the internet = capacity / consumption UPS last capacity calculator you... 2 factors, the solar panel too is not connected to the load 40... One Hour if discharged at 0.5C provides 500mA for two hours a UPS last easily calculated the. Battery kicks in automatically, powering whatever you have plugged into the UPS without interruption %! Take a laptop with a 100Wh battery such as the newest MacBook Pro total!

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