4pcs Batteries LED 18650 1200mah Li Ion Battery 3.7v Lithium Rechargeable Battery Blue High Capacity For Flashlight|li-ion battery|rechargeable batterybattery 3.7v - AliExpress
18650 3.7 Volt Lithium Ion Rechargeable Battery (2200 mAh)
Li-Polymer Battery 3.7V 1500mAh
EBL 12-Pack 3.7V 800mAh 14500 Li-Ion Rechargeable Batteries for LED Flashlight Torch - Walmart.com