Convert between watt-hours, amp-hours, and voltage to compare any PEV battery.
Battery capacity tells you how much energy a battery can store. Manufacturers typically list this as watt-hours (Wh) or amp-hours (Ah), and understanding both helps you compare batteries across different PEVs.
The most useful unit for comparing batteries regardless of voltage. A 500 Wh e-bike battery and a 500 Wh scooter battery store the same total energy even if they run at different voltages. Always use Wh to compare range potential.
Tells you how long a battery can deliver current at a given voltage. Most e-bike and scooter manufacturers list capacity in Ah — use this calculator to convert to Wh for a fair comparison.
1 kWh = 1,000 Wh. This is the standard unit for electric cars and larger vehicles. A typical e-bike battery is 0.3–1.0 kWh; a Tesla Model 3 is around 75 kWh.
Used for small electronics — phones, power banks, and accessories. A typical smartphone battery is 3,000–5,000 mAh. To convert to Wh: divide mAh by 1,000 to get Ah, then multiply by voltage.
A battery's voltage affects its power output. Higher voltage batteries deliver more power at the same current, which is why performance scooters and high-end e-bikes often use 60V or 72V systems instead of 48V.
But higher voltage does not mean more range — that depends entirely on total watt-hours. A 48V 20Ah battery (960 Wh) stores more energy than a 72V 10Ah battery (720 Wh), and will deliver more range despite having lower voltage.
| Vehicle type | Typical range | Common voltage |
|---|---|---|
| Entry e-bike | 250–400 Wh | 36V |
| Mid-range e-bike | 400–600 Wh | 48V |
| Long-range e-bike | 600–1,000 Wh | 48–52V |
| Entry e-scooter | 200–400 Wh | 36–48V |
| Performance scooter | 500–1,500 Wh | 60–72V |
| E-unicycle | 500–3,000 Wh | 67–100V |
| Onewheel | 130–650 Wh | 48–63V |