I was trying to upgrade the battery pack of a Black Decker 12V cordless vacuum from NiMh to Li-Ion. I assumed a 3S25A BMS together with three cells would be fine. But when I connect the new battery pack, it only runs half a second then power is cut. When I connect battery without BMSi it runs fine. Interestingly when I try this BMS on a 12V cordless drill, it runs fine. Then I tried the battery pack from the drill on the vacuum, it again runs fine. What could be the issue?
Another related question; attached photo side by side two cheap 12V cordless drill boads, is there any protection on them and what is the difference. 24V label is fake, they are just 12V.
Thanks in advance.
Another related question; attached photo side by side two cheap 12V cordless drill boads, is there any protection on them and what is the difference. 24V label is fake, they are just 12V.
Thanks in advance.
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