Amazon.com: TOPUSSE Rechargeable 3.7v 14250 Battery with Charger, 4 Pack Lithium Ion 1/2 AA Size Batteries Can Replace 3.6 Volt LS 14250, ER14250, 3v CR14250 Battery for Laser : Health & Household
Kraken Sports 18650 Lithium-Ion Battery with Micro-USB B-1834USB
2-Slot Fast Battery Charger + 4 x 18650 3.6 Volt Li-Ion Batteries (2000 mAh)