I have a Wifi AP and its Li-ion battery has swollen so much that its cover cannot be put in place over it now.
Its working but its backup time has reduced to 20%. I cannot put on the battery cover because of its bulge. Normally its mains charger is power-ON 24/7.
Is it safe to keep it working in this shape? Is their any recommendation as to when to replace a Li-ion battery? Is it possible that it blows up and catches fire?
Best Answer
Provided it hasn't been over-charged, over-discharged or physically damaged it should be safe. But, why did it puff up? If it was overcharged, over-discharged or physically damaged then it could blow up.
Apart from that, puffing indicates that some of the electrolyte has turned into gas, which reduces the capacity and efficiency of the cell.
You should discharge this cell to zero volts, discard it and get a replacement.