SureFire 18650 Protected Lithium Ion Rechargeable Battery, Black 18650 Protected Lithium Ion Rechargeable Battery Recharge the lithium-ion battery an AC wall charger or the DC vehicle charger (sold separately) Long-life rechargeable Li-Ion battery provides a minimum of 500 charge cycles Built-in PCM protects against overcharging, over-discharging, excessive current draw, and short-circuiting Manufactured in the U.S.A