Lithium-ion battery safety 101

[Bort (BortyMcBortface)]

The voltage drop immediately off the charger mentioned here should be added to his thread (unless its already there and i missed it)

My charger do not charge LiIon to 4.2V, is it faulty?

My charger do not charge LiIon to 4.2V, is it faulty? [image] I see this question fairly often and most of the time the answer is: No, it works exactly as it is supposed to do. Lets start with a typical battery datasheet: [image] It says the charging voltage must be 4.20 volt, it do not say anything about the battery voltage. It do also say what the standard charge current is (This is the charge current to use if you want the specified number of cycles, higher current w…