Formula: `Capacity (Ah) = Energy (Wh) / Voltage (V)` Example: A battery is rated at 7.4Wh and the voltage is 3.7V, then the capacity is `7.4 / 3.7 = 2Ah`. These formulas are simple and practical, and are suitable for quick estimates. How to Measure Lithium ion Battery Capacity?
Here are two common formulas to help you calculate capacity quickly: 1. Based on Current and Time: Formula: `Capacity (Ah) = Current (A) × Time (h)` Example: If the battery is discharged at 0.5A for 4 hours, the capacity is `0.5 × 4 = 2Ah`. 2. Based on Energy and Voltage: Formula: `Capacity (Ah) = Energy (Wh) / Voltage (V)`
To meet practical usage requirements, lithium-ion batteries usually need to form a battery pack. However, due to production deviations and different usage environments, there are inconsistencies between batteries within the battery pack. This makes it challenging to estimate the state of charge (SOC) of the battery pack accurately.
This battery pack calculator is particularly suited for those who build or repair devices that run on lithium-ion batteries, including DIY and electronics enthusiasts. It has a library of some of the most popular battery cell types, but you can also change the parameters to suit any type of battery.
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