Lumenier Lum-Lipo-1800-3-35 1800mAh 3s 35c Lipo Battery, High quality Lumenier lipo batteries provide you with great performance for your multi-rotor airframes and planes The dimensions are sized to easily fit in all of Lumenier's air-frames including the QAV250, QAV400, QAV500, and QAV540G 104 x 34 x 20mm 11.1 v XT60 connector