18650 Blue Lithium-Ion Rechargeable Battery - 3.7V 2600mAh | xUmp
Renogy Smart Lithium Iron Phosphate Battery Rechargeable Lithium 121000 Generator Batteries in the Device Replacement Batteries department at Lowes.com
3.7V Rechargeable Lithium ion Battery LP18650A+ 2P 7000mAh With PCM and JST PHR-2 Connector
3.7V Rechargeable Lithium ion Battery LP18650A+ 3500mAh With PCM and JST XHP-2 Connector
Amazon.com: HW USB Rechargeable AA Batteries, Lithium Ion 1.5v Constant Output 2800 mWh Large Capacity Double A Batteries Charges Under 2 Hours, Over 1000 Cycles, 4-in-1 USB Charging Cable, 8-Pack : Health & Household