Project update 2 of 8
How To Change Battery Charging Current
by André HillbomWe would like to thank our backers for supporting this project. We are getting close to reaching the goal! Meanwhile, we made a quick guide on how to change the battery charging current.
It is possible to easily change the charging current by replacing the charging current set resistor. The resistor value is calculated using the following equation:
R = 1000/I
To make it easier to select the resistor value, we have precalculated some of the values. The Ideal resisor column lists the calculated resistor values. Since it is not possible to buy resistor of any arbitrary value, there is an additional column which provides closest E24 and E48 series standard resistor values. The Actual current column calculates the charging current based on the selected E24/E48 resistor.
| Charging current, mA | Ideal resistor, kOhm | Closest E24/E48 resistor, kOhm | Actual current, mA |
|---|---|---|---|
| 500 | 2.00 | 2.00 | 500 |
| 400 | 2.50 | 2.49 | 402 |
| 350 | 2.86 | 2.87 | 348 |
| 300 | 3.33 | 3.32 | 301 |
| 250 | 4.00 | 4.02 | 249 |
| 200 | 5.00 | 5.11 | 196 |
| 150 | 6.66 | 6.49 | 154 |
| 100 | 10.00 | 10.0 | 100 |
| 75 | 13.33 | 13.3 | 75 |
| 50 | 20.00 | 20.0 | 50 |
| 40 | 25.00 | 24.9 | 40 |
| 30 | 33.33 | 33.2 | 30 |
| 20 | 50.00 | 51.1 | 20 |