Calculate how long it will take to charge your car, motorcycle, or boat battery from any state of charge.
| Charger Rate | 60Ah (empty→full) | Best For |
|---|---|---|
| 2A trickle | ~35 hrs | Maintenance / storage |
| 4A slow | ~18 hrs | Overnight charge |
| 6A standard | ~12 hrs | Most home chargers |
| 10A fast | ~7 hrs | Quick recovery |
| 15A high | ~4.5 hrs | Professional use |
| 40A boost | ~1.5 hrs | Emergency — shorten lifespan |
Rule of thumb: charge at C/10 (10% of Ah rating) for safest battery longevity. A 60Ah battery charges best at 6A.