Battery charge time chart
A half-charged 60Ah battery takes about 18 hours on a 2A charger, 6 hours at 6A and 3.6 hours at 10A.
CTEK 40-658 NXT 5 Fully Automatic 4.3 amp Battery Charger and Maintainer 12V
4.3A
A mid-range pick from the gear this chart is about. More across the price range below the chart.
Hours = amp-hours to replace x 1.2 / charger amps. The 1.2 covers losses and the slow finishing stage. Run your own numbers in the battery charge time calculator.
| Battery | 2A | 4A | 6A | 10A | 15A | 25A |
|---|---|---|---|---|---|---|
| 40Ah | 12.0 | 6.0 | 4.0 | 2.4 | 1.6 | 1.0 |
| 50Ah | 15.0 | 7.5 | 5.0 | 3.0 | 2.0 | 1.2 |
| 60Ah | 18.0 | 9.0 | 6.0 | 3.6 | 2.4 | 1.4 |
| 70Ah | 21.0 | 10.5 | 7.0 | 4.2 | 2.8 | 1.7 |
| 80Ah | 24.0 | 12.0 | 8.0 | 4.8 | 3.2 | 1.9 |
| 100Ah | 30.0 | 15.0 | 10.0 | 6.0 | 4.0 | 2.4 |
| Battery | 2A | 4A | 6A | 10A | 15A | 25A |
|---|---|---|---|---|---|---|
| 40Ah | 22.8 | 11.4 | 7.6 | 4.6 | 3.0 | 1.8 |
| 50Ah | 28.5 | 14.3 | 9.5 | 5.7 | 3.8 | 2.3 |
| 60Ah | 34.2 | 17.1 | 11.4 | 6.8 | 4.6 | 2.7 |
| 70Ah | 39.9 | 19.9 | 13.3 | 8.0 | 5.3 | 3.2 |
| 80Ah | 45.6 | 22.8 | 15.2 | 9.1 | 6.1 | 3.6 |
| 100Ah | 57.0 | 28.5 | 19.0 | 11.4 | 7.6 | 4.6 |
Chargers across the amp range
An even spread across the price range. Prices change often.
Frequently asked questions
Where do the numbers in this chart come from?
Hours = amp-hours to replace x 1.2 / charger amps. The 1.2 covers losses and the slow finishing stage. They are calculated, not measured on any one product, so real results vary with the specific model, its settings and its condition. The battery charge time calculator runs the same formula on your own inputs.