Amazon.com: IMREN 18500 Rechargeable li-ion Battery 3.7V 1200mAh with Button Top (4PCS) : Health & Household
Olight 18650 Li-ion Button Top Battery 2600mAh 3.7V
18650 Protected Button Top battery Panasonic-Orbtronic (FREE Battery Holder) 3400mAh
100% New Original NCR18650B 3.7 v 3400mah 18650 Lithium Rechargeable Battery For Flashlight batteries|rechargeable battery|battery forbattery rechargeable - AliExpress