3.7V 2600MAH USB RECHARGEABLE 18650 BATTERY LI-ION 5.2A & USB CHARGER – www.nightprovision.com
Amazon.com: HXJNLDC DC 3.7V 2600mAh 903759 Rechargeable Lithium Polymer Replacement Battery for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Electronics
UltraFire 2600mAh 3.7V 18650 Rechargeable BRC Lithium Battery With Pro
Amazon.com: Qimoo Voice Amplifier Replacement Battery B0143KH9KG 3.7V 2600mAh Rechargeable Lithium-ion Battery, with XH2.54mm Connector : Health & Household
3PCS 3.7V Lithium Li-ion Rechargeable Batteries 2600mAh Large Capacity Battery for Flashlight, Doorbells, Headlamps, RC Cars etc - Walmart.com