Battery Life Calculator

Enter the required parameters and the calculator will calculate the expected battery life time for any battery.

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Battery capacity:

Ah ▾

(Discharge safety):

Device consumption:

µA ▾

(Awake time):

sec ▾

Sleep time

Average consumption:

mA ▾

(Battery life):

mA ▾

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Get an accurate estimate of battery life with the help of this free battery life calculator seamlessly. As this online tool is solely designed to calculate the average consumption and the battery life.

What Is The Purpose of Battery Life?

Battery life refers to a specific period in which it keeps working and after that time, it needs to be recharged. It is the lifespan of the battery that lasts until you have to replace or recharge it. The life of a battery is affected by several factors such as moisture, high temperature, dirt, vibration and more.

Terms In Battery Run Time Calculation:

Either you are performing the battery life calculation manually, or with the help of the battery life calculator, you will have to determine the following terms for performing the correct calculations.

The most vital terms related to battery life are:

Capacity:

It means the total capacity of the battery in ampere-hours. You can find it on your battery. Mostly, it is printed on the battery.

Consumption:

This is the average amount of current in amperes that has to go out towards the electronic devices connected to the battery.

Discharge Safety:

This is the percentage of the battery capacity that is never gonna be used.

Battery Life Formula:

Let's see the following formula to calculate the battery life manually:

Battery life = Capacity / Consumption × (1 - Discharge safety)

Why Sleep Drain Battery?

In sleep mode, your device is still ON and it consumes power of the batter but this consumption is lower than the awake time. If you need to find out the average consumption then use the following formula that is based on the awake and sleep time.

Average consumption = (Consumption1 × Time1 + Consumption2 × Time2) / (Time1 + Time2).

If it seems difficult to perform the calculation then get the help of a battery drain calculator. As it will let you perform the calculation instantly.

Awake Time:

This is the amount of time in which the electronic device is not sleeping during one operational cycle of the battery.

Consumption in Sleep Mode:

The amount of consumption in amperes that your devices consume in sleep mode.

Sleep Time:

This is the time that your device spends in sleep mode during one cycle of operation.

Why Calculate Battery Life?

The life of a battery is the most important factor in a circuit. It is very essential to estimate how long the battery will last according to the amount of consumption. You can perform battery run time calculation, manually with the help of the above-listed formula or can get the assistance of a good online battery life calculator.

How to Calculate the Battery Life?

Follow the below-listed steps to calculate the battery life manually:

First of all, determine the capacity of the battery by checking the battery or with the help of a battery capacity calculator
Determine the consumption of the electronic device
Now assume the discharge safety is 20%
Put these values in the above-mentioned formula to find out the battery life

If you are not good at calculations, then don't worry, simply get the assistance of a battery runtime calculator. By using it, you will be able to know the battery life effortlessly.

Working of Our Battery Calculator:

Calculating the battery life with our battery run time calculator is much easy and straightforward. You just have to add a couple of inputs and it does the rest calculation instantly. Let's see how it works:

Inputs:

Enter the values of the “battery capacity”, “device consumption”, “discharge safety”, “awake time”, and “sleep time” in the designated fields
Tap on the “calculate” button

Output:

Average Consumption
Battery Life in Hours
Battery life in Other Units
Average Consumption in Other Units

Rechargeable Batteries Properties Table:

Battery run time calculation depends on the following characteristics:

Type of Battery	Electrolyte	Operating Temperature (oC)	Open Cell Voltage (V)	Energy Density (Wh/kg)		Charge / Discharge Efficiency (%)	Power Densities		Life Cycles
Type of Battery	Electrolyte	Operating Temperature (oC)	Open Cell Voltage (V)	Theoretical	Achievable	Charge / Discharge Efficiency (%)	Peak (W/kg)	Sustained (W/kg)	Life Cycles
Lead-Acid	H2SO4	-20 - 60	2.1-2.2	171	30-40	70-90	120	25	200-2000
Nickel-Iron	KOH	20 - 30	1.2	267	60	65			2000
Zinc-Iron	KOH	50 - 60	1.65	1084	90	45			600
Sodium-Sulfur	β-Al2O3	300 - 400	1.76-2.08	664	120	70	240	120	2000
Lithium-Iron Sulfide	LiCl-KCl	400 - 450	1.6	869	150	75			1000
Nickel-Cadmium	KOH	-40 - 60	1.2		40 - 60	70-90	300	140	500 - 2000
Nickel-Metal Hydride	KOH	10 - 50	1.2		60 - 80	50	440	220	< 3000
Nickel-Zinc					60
Lithium Ion	LiPF6	-20 - 60	3.6		100 - 200	70	720	360	500 - 2000
Lithium-sulphide	AIN	430 - 500			130	75	200	140	200
Zinc-chlorine	ZnCl2			120		65	100
Lithium ion polymer	Li-β-Alu	-20 - 60	3.7		130-200	70			>1200

FAQ’s:

How Long Does 5000mAh Battery Last?

Today’s smartphones having 5000 mAh battery can last up to two days while performing basic tasks, but if you will run music and videos then the battery life will be reduced according to the use and consumption of the device.