The Blackcell BU2 USB Battery Charger is a small but diverse dual bay charger able to charge 33 different sized cells! That's including our trusty 18650, 20700, 21700, and 26650 cells. The BU2 charger comes with a microcomputer-controlled charging system it automatically detects (NI-MH) batteries and Li-ion batteries as well. The implementation of the micro computer makes for a safer and more accurate charging process.
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