The old lithium battery cannot be charged
240KW/400KW industrial rooftop - commercial rooftop - home rooftop, solar power generation system.
It is well known that Li-Ion batteries should not be deep discharged. But sometimes they do discharge deeply. Is it OK for the device to remain in such state for a long time (and recharge again only ... $begingroup$ Yes, it is dangerous to attempt to charge a deeply discharged Lithium battery. Most Lithium charger ICs measure each cell''s ...