HUBSAN Flight Battery for X4 H502E/H502S Desire Quadcopter
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Found! An Alternative Flight Battery For Hubsan H501S! | DroneFlyers.com Quadcopter Discussion Forums
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Amazon.com: sea jump 2X7.4V 2700mAh 10C Lipo Battery Replacement with 2in1 Battery Charger for Hubsan X4 H501S H501C H501A H501M H501S W H501S pro FPV Quadcopter to Increase The Flight time(40mins) :