ps la 7,4 2s 1300mah che avevo montato (cinese) ne pesava 85gr!!!anche se.. dopo 5 voli.. scendeva solo di 250/300 mah

This receiver pack lipo battery is perfect for use in .10 to .60 size rc airplanes
RC TP-900-2SPLRX LiPo:
Voltage: 7.4V
Cells: 2S
Capacity: 900mAh
Includes balance connector, universal receiver/servo connector and 22 AWG wire leads
Weight: 46g
Dimensions: 14 x 33 x 55mm