Amazon.com: CaoDuRen MSDS Verified Part Number: 652540 Replace for 602540, Rechargeable 3.7V 650mAh Li Lipo Lithium Polymer Ion Battery Pack with 2 Pin 2.0mm JST Connector : Health & Household
Amazon.com: Avantree BL-5B Rechargeable Li-ion Battery (3.7V 650mAh) - for use with Avantree 10BS, 10BP and CK-11 : Health & Household