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UniqueFire BC-U2 charger is apply to 14500/17670/18500/18650/18700 abd 10440/16340 Li-ion battery when usd 2pcs spacers simultaneously but independently.
It builts USB output function can supply electricity to those devices power below 5.0V/500mah.
BC-U2 is designed with undervoltage lockout , algorithm(TC.CC.CV) charging method , reverse-polarity protection circuit board, over/under voltage disconnecting technology and battery over discharing activating function ,it is your best choice for a safer more intelligent and more reliable li-ion chagrer .