... with 3.7V Li-ion batteries,like 18650 ,17670,17690,17500,18500,17650, 14500,10440 batteries USB output Ultrafire WF-200 LCD ... charger compatible with 3.7V Li-ion batteries,like 18650 ,17670,17690 ... cut off device2.Built - in Timer Protection3.LCD flash and display "charging"; standby stae: LCD dispay"standby"3.Upon discharge,switch located ...