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Cellphone battery chargers range from C/10-rate trickle chargers to 2C-rate fast switching chargers, from constant-current and constant-voltage
devices for single cells to micro-controller designs, to satisfy the specific cell chemistry and complex charge profile of NiCd, NiMH, Li-ion and other smart battery packs.
Most chargers even check the battery electrical connection before starting, and then protect it from over/under voltage, over/under temperature
or excessive charge current. They can be powered from a conventional 90-260VAC universal input or from a 12VDC cigarette lighter adapter.
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