Two-Pack of Lasertac 11340 Rechargeable Batteries (Improved Version) for Lasertac subcompact Laser Sights and Lights (for LX-S, GLX-S, GLLX-S Models) A Pair of 11340 Rechargeable Battery (Improved Version) Can be used for Lasertac subcompact Laser Sights and Lights (GLLX-S, GLX-S, LX-S) Only charge it with a charger with protection circuit such as Nitecore i2/I4 or UM10/UM20 Do not overcharge or overdischarge the battery