Important voltages for various battery chemistries (mostly based on wikipedia articles).
| Ni-MH | Ni-Cd | Li-ion | Li-Po | LiFePO4 | |
|---|---|---|---|---|---|
| nominal (1 cell) | 1.2 | 1.2 | 3.7 (NMC 3.6) | 3.7 | 3.2 |
| not recharge below!* * | n/a | n/a | 2.4-2.9 | n/a | |
| discharged | 1.0-1.1 | 0.9-1.0 | 2.7-3.0 | 2.7-3.0 | 2.8 |
| charged OCV | 1.41 | 1.25-1.35 | 3.3 | ||
| slow charging above | 1.29 | 1.5 | 4.2 | ||
| stop charging | n/a | 1.6 | 4.2 | 4.23 | 3.6 |
| damage/explosion!!!* | 1.78 | 1.71 | 4.3 | 4.235 | 3.8 |
| float?? @20°C * * * | 4.1 (4.0-4.2) | 3.9-4.05 | 3.3 |
| Sealed Flooded (Freezing point) | Gel | AGM | |
|---|---|---|---|
| Nominal voltage (6 cells) | 12.00 | 12.00 | 12.00 |
| Stop current charging | 14.40 | 14.40 | 14.40 |
| Float voltage 25 °C | 13.40 | 13.05 | 13.60 |
| OCV @ SOC 100% | 12.70+ (-60°C) | 12.85+ | 12.80+ |
| OCV @ SOC 75% | 12.40 (-50°C) | 12.65 | 12.60 |
| OCV @ SOC 50% | 12.20 (-36°C) | 12.35 | 12.30 |
| OCV @ SOC 25% | 12.00 (-24°C) | 12.00 | 12.00 |
| OCV @ SOC 0% | 11.80 (-10°C) | 11.80 | 11.80 |
| Stop discharge | 10.50 | 10.50 | 10.50 |