Recent content by aeromedved

I'm charging it with 1.2A to 4.2V/cell with minIc = 100mA. DJI BMS disconnects the battery at the end of charge if lower minIc is used. I didn't try higher currents as I'm using only 2 power pins out of 4, although the manufacturer rates the connector at 5A/pin. The maximum and recommended...

I charge my MM battery with the B6 charger all the time. Don't have the connector yet so I folded some 0.1mm nickel strips to match the 0.4mm pin thickness on the drone and plug them directly into the battery connector. My B6 is flashed with a custom firmware (cheali charger fw) that allows to...

Quite a Frankenstein you got there! Do you connect the 3s battery through the BMS or in another way?

You've checked everything that could be checked. I don't think DJI did something if they didn't fail all at the same time. The MCU seem to be alive, not sure about the battery gauge IC. since you were using the .100 firmware version it is possible that it doesn't report all the fault flags that...

Alright, so the BMS does communicate with the drone. When jumping the FETs you might've jumped the current sensor as well, if there is one on the board. At this point it is more screwing around than troubleshooting :) Edit: did you try to update the firmware on the bad BMS? If it is going to...

Looks like either the controller considered the battery unsafe and disabled power FETs or it got zapped with static as it possibly wasn't ESD-hardened on the cells side because DJI did not expect someone to use the board this way :) You can jump the power FETs and see what error the drone...

Exactly. I used those pins as an example. Interesting, do the drone LEDs indicate full battery on a short press but it doesn't turn on with a long press? If that's the case see what you get on the battery connector, does it have the correct voltage on the "+" and "-" pins? Does it stay within...

When plugging and unplugging the balance connectors that you used for the magic boards there's no defined order in which the pins make contact. It is possible that as you unplugged the balance lead, the center pin got disconnected earlier than the other two and BMS read the 1st cell as being at...