Recently I found an issue with BR (4S6P) batteries, one cell is not discharging. I charged the battery to 16.8V using BR battery charger. After charging I checked the battery voltage across the XT90 terminals, the voltage is 16.8V and individual cell voltages are cell no.(1) 4.2V cell no .(2) 4.2V no.(3) 4.2V cell no .(4) 4.2V. After that I discharged the battery with 2 methods.
- discharged the battery using BR battery charger itself(using discharge option).
- discharged using operating ROV.
While using ROV battery suddenly discharges to 12.9V in QGC. Then I checked the battery voltage across XT90 terminal and checked individual cell voltage. Total voltage is 12.9V and cell voltages are cell no.(1) 3.2V cell no (.2) 3.2V cell no.(3) 2.5V cell no .(4) 4V. On of the cells (cell 4) are not discharging during operation. Before that we used to connect the batteries parallel. Is there any issue for paralleling batteries or why the cell no 4 is not discharging?? @jwalser @patrickelectric