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URGENEX 7.4V Li-ion Battery 2000mAh 2S Battery with SM 2P Plug High Capacity for Remote Control RC Boat 1 Pack H101 RC Batteries with 1 USB Chargers: Amazon.de: Spielzeug
7.4V 2000mAh 18650 Li-ion Rechargeable Battery Pack 10C Rate for Water Gun Toys With SM Connector - AliExpress