Amazon.com: 3.7Volt Lipo Battery 2000mAh Rechargeable Battery Pack with Wire and JST Connector, ICR18650 Battery 2000mah 3.7v Replacement Batteries for Electronics, Toys, Lighting, Equipment : Electronics
Amazon.com: 1Pcs 18650 3.7v 4400mAh 1S2P Li ion Rechargeable Battery Pack with 2.0Pin JST-PH Connector 16.28Wh/4.4A, Blue, 6.6 x 1.8 cm (19.28Wh/4.4A) : Health & Household