motorbike battery
- 12-14 milliohm internal resistance
- active-battery-balancing-board-dat
- internal 4x2 = 14.5 V
- 10C / Instant discharge 20C
1. Overview
- 26650 = Cylindrical cell, 26 mm diameter, 65 mm length.
- Commonly Li-ion chemistry (LiCoO₂, LiNiMnCo, LiFePO₄, etc.).
2. Typical Specs (Li-ion NMC type)
| Parameter | Common Value Range |
|---|---|
| Nominal Voltage | 3.6–3.7 V |
| Capacity | 4,000–5,500 mAh |
| Energy (Wh) | 14.4–20.35 Wh |
Energy formula:
Energy (Wh) = Nominal Voltage × Capacity (Ah)
Example:
- 5000 mAh (5.0 Ah) × 3.65 V ≈ 18.25 Wh
3. LiFePO₄ 26650 Variant
| Parameter | Common Value Range |
|---|---|
| Nominal Voltage | 3.2–3.3 V |
| Capacity | 3,000–3,500 mAh |
| Energy (Wh) | 9.6–11.55 Wh |
4. Summary
- NMC/NCA Li-ion 26650: ~18 Wh typical.
- LiFePO₄ 26650: ~10 Wh typical.
- Actual usable energy is slightly less due to discharge cut-off and efficiency losses.