Self-destruct of Dell batteries

Published March 15, 2019 by Sean

Just a quick introductory placeholder to start pulling together the state of smart battery management and planned obsolescence in 2019. My 2 year old 6 Cell 6400mAh 74Wh Dell 357F9 Battery (in an Inspiron machine) suddenly reported itself as ‘non genuine’, and unable to charge. On inspection, the cells were charged (although one was low) but the battery terminal voltage was zero. The battery does not charge. Initial assumption is that the BMS firmware has fused one of the links on the board, but it is also possible that there is a mainboard fault.

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