Amazon.com: 3.7V 1800mAh 804050 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with PH2.0mm JST Connector(Actual is 2000mAh.) : Health & Household
Makerfire 3.7V 1800mah Lipo Battery 25C JST Plug with USB Charger for RC Quadcopter Drone: Amazon.de: Spielzeug
Hixon 3.7V 1800mAh Polymer-Plastik Li-Ionbatterie Sr1003450 - China li-ionbatterie, batterie
EEMB 3.7 V Lipo battery 1800 mAh 963450 rechargeable lithium polymer ion battery with JST connection. Make sure that the polarity of the device matches with battery before purchasing: Amazon.de: Electronics & Photo