Older cellphones, powered with nickel cadmium batteries, had a problem with battery charging. Basically, if the battery wasn’t mostly used before recharging, the battery would develop a memory, and beging to function as if the new recharge point (half full, etc) was really “empty”. Over time, the battery became useless.
One of the improvements created by lithium ion batteries in cell phones is that they do not have the memory effect upon recharging. No need to fully drain before recharging.
All of that said, I have a lithium ion phone that is acting very weird. Chunghwa sales people are telling me that I need to treat it like an old nickel cadmium phone and fully drain it before recharging.
Is it possible that even though the battery is LI (labeled as such) that it might be some inferior type (locally made?) that functions as an old NC battery?
By the way, the goofy phone behavior is that it shuts off many times a day even with a full battery charge.