Meaning you choose the options for now without buying a whole new battery? The other is still to buy a new pack, or good cells from a de-pack, with which you can probably repair the battery in a fairly simple way, because whether something has died in the charger or the battery PCB cannot be ruled out temporarily. And there is a good chance that the original charger will start charging such a battery, because with different rechargeable batteries it doesn't have to.
And we don't know the history of the battery, mine was two years old, so quite "normally", after the warranty it stopped working
in the morning it was gleefully flashing the charger
which was already less funny....
wujek_demon92 wrote: I understand that the unsolder etc voltage is applied directly to the + and - of the connected 5 cells?
The battery outputs are connected to the terminals of the extreme cells, so theoretically nothing needs to be unsoldered, except for the sake of sanity about the battery electronics.
wujek_demon92 wrote: Charge all together or just the weaker ones or just replace them?
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And which are the weaker ones?
In my case it was clearly the second cell that died, the ones next to it had lower voltages, i.e. the over-perishable cell must have already affected the charging of the adjacent ones, one of which survived and still works today, but I use it poorly....
Altogether two to be disposed of, because the last normal use or charging damaged the second cell, and the first charge finished off the neighbouring one, probably the third middle one, because I can't remember anymore....
Charge it as a whole, or individually, it depends what you want to charge with, but check the voltages on the individual cells so that none exceeds 4.2V, also it would be best to charge each battery individually, as they will all be charged to the same voltage straight away.
I charge mine as a whole, 21V to the battery terminals, 0.8A current.
) to select suspicious pieces.
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