Amazon.com: HUIN High-Capacity Low Self-Discharge 10440 Lithium Ion Button Top Batteries 3.7V 1000 Lithium Ion Replacement Cells for Electric Shaving : Health & Household
Amazon.com: Demonfire 10440 600mAh 3.7V High Drain Li-Ion Rechargeable Battery with Button Top (4 Pieces) & Demonfire D1 Charger : Health & Household
Amazon.com: 18650 Wall Charger, 2 Bay Intelligent Battery Charger for 3.7V Li-ion 10440,14500,16340,18350,18650 Rechargeable Battery(4 pcs) : Electronics
Amazon.com: 4 Pcs ICR 10440 Rechargeable Lithium Ion Battery,3.7v Batteries 350mAh (10 * 44mm, Shorter Than AAA Size) : Health & Household