Lithium Battery Voltage & Capacity Chart
A reference chart for common lithium battery voltage and capacity combinations across applications.
Voltage (V) and capacity (Ah) together determine a lithium battery's total energy storage (Wh = V × Ah), but each spec plays a different practical role: voltage must match your device/vehicle's electrical system, while capacity scales runtime or range within that voltage. This chart maps common combinations by application.
Reading the numbers correctly
Watt-hours (Wh) — the true measure of total stored energy — equals voltage multiplied by amp-hours. A 12.8V 200Ah battery stores 2,560Wh, the same as a 25.6V 100Ah battery — same energy, different voltage/current trade-off. This is why comparing two batteries by Ah alone, without checking voltage, can be misleading.
Common Lithium Battery Voltage & Capacity Ranges by Application
| Application | Typical Voltage | Typical Capacity | Chemistry |
|---|---|---|---|
| E-Cycle | 36V – 48V | 7.5Ah – 15Ah | LiFePO4 |
| E-Scooter / Bike | 48V – 74V | 24Ah – 40Ah | NMC / Li-Ion |
| E-Rickshaw | 51V | 86Ah – 100Ah | LiFePO4 |
| Home Inverter | 12.8V / 25.6V / 48V | 100Ah – 300Ah | LiFePO4 |
| Solar / ESS (residential) | 12.8V – 51.2V | 100Ah – 300Ah | LiFePO4 |
| Rack Type / Commercial BESS | 48V / 96V / 120V | 200Ah – 500Ah | LiFePO4 |
Frequently Asked Questions
How do I calculate watt-hours from voltage and Ah?
Multiply voltage by amp-hours: Wh = V × Ah. This gives the total stored energy, which is the fairest way to compare batteries with different voltage/Ah combinations.
Can I increase my battery's capacity without changing voltage?
Yes — batteries of the same voltage but higher Ah are generally compatible as an upgrade for more runtime/range, as long as physical size and connector fit your system. Never mix voltages.
Why do e-rickshaws standardize around 51V?
It's the voltage most commonly used by Indian e-rickshaw motor/controller manufacturers, making 51V batteries broadly compatible across that vehicle segment.
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