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Someone else's solution
Capacity Tests
First Discharge Test
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Thoughts:
- These batteries were not fully charged. They should have been closer to 14.4v. Need to charge and re-test.
- Did a balanced charge and they took in 11Ah (10.939 Ah) charge over 15 hours and finished at 14.4v. Once removed from the charger, they dropped to 13.9v.
Single Battery Tests
The rated capacity of these batteries is 2500 mAh. It appears that the average capacity seems to be around: 1186 mAh.
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Pack | Original Capacity | Starting Voltage | Final Voltage | Capacity (mAh) | % Capacity | ~Capacity/Cell | Notes |
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2 | 20Ah | 14.4 (3.6v/cell) | 8v | 10156 | 51% | 1270 mAh | |
3 | 20Ah | 14.4 (3.6v/cell) | 8v | 10926 | 55% | 1366 mAh | Could the battery be overcharged? |
3 | 8v | 9791 | 49% | 1224 mAh | |||
3 | 8.49v | 7727 | 39% | 965 mAh | BMS Added. | ||
3 | 8.55v | 6315 | 32% | 789 mAh | Charging via power may be the issue? Discovered that I had connected the cell voltage connectors in the wrong order. | ||
3 | 13.91 (3.48/cell) | Cells balanced before test to: 3.52, 3.58, 3.31, 3.32 BMS is attached. |
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