The battery model purchased by myself is: 18650 rechargeable battery Specification 01: Green light bare pen [without charger box] Specification 02: Green light set [one charge without box] Specification 03: Green light set [one charge has a box] Specification 04: Green light set [one charge without box + five in one] Specification 05: Red light bare pen [without charger box] Specification 06: Red light set [one charge without box] Specification 07: Red light set [a charging box] Specification 08: Red light set [one charge without box + five in one] Specification 09: blue-violet bare pen [without charger box] Specification 10: Blue-violet light set [one charger without box] Specification 11: Blue-violet light suit [one charge has a box] Specification 12: Blue-violet light set [one charger, no box + five-in-one] Specification: 1. Wavelength: 532nm. 2. High power military grade. 3. Beam style: continuous line. 4. Warm-up time: