UltraFire WF-139 3.6/3.7V Battery Charger for 18650, 14500, 16340, RCR123 Li-ion Batteries, comes with two spacers for charging 16340 Ultrafire WF-139 Lithium battery charger Charge only 18650, 14500, 17500, 18500 or 17670 lithium batteries. 100V/220V auto AC switch Charge single or two batteries at a time Two separate charging channels - batteries can be mix-charged