Batteries (10440 size for 5/8 hoops) - 4-Pack with Case, HyperionHoop.com
Echargeable Micro USB Port 1.5V 350 mAh AAA High Capacity Li-ion 10440 Battery Rechargeable Lithium Battery - China Power Tool Battery and Tool Battery price | Made-in-China.com
Amazon.com: 4 Pcs ICR 10440 Rechargeable Lithium Ion Battery,3.7v Batteries 350mAh (0.39 * 1.73 inch, Shorter Than AAA Size) : Health & Household
Amazon.com: PKCELL ICR10440 Lithium Ion Rechargeable Battery 3.7V 350mAh with USB Charger (2pc Button top +Charger)(They are not AA Size Battery) : Health & Household
4pcs Liter energy battery 3.7V 380mAh High Capacity 10440 Li-ion Rechargeable Battery AAA Battery for LED Flashlights Headlamps - AliExpress
Protected Vapcell P1054A 10440 1.5A Button Top 540mah USB Battery - Ge – Liion Wholesale Batteries
ICR10440 3.7V Li-ion 10440 battery + AAA to AA size battery converter spacer | eBay