I want to know when charging a battery whether the charger reduces its current input as the battery reaches 80 percent charge, because it takes longer to charge the battery due to the charge curve.
Or is the internal resistance of the battery causing more heat to be dissipated whilst charging past 80 percent?
Thought I'd also clear up that it's a phone charger with a lithium ion battery. I'd also be interested in this for a lead acid battery and charger.
Thanks in advance.