CHAO CAC BAN , CAC BAN GIUP MINH VOI VAN DE : MAY BAY KHONG DUNG DUOC VI PIN KHONG NAP DUOC DIEN , DIEU KHIEN TAY GA KHONG THAY MAIN ROTOR QUAY TOAN BO CAC KENH KHAC CUA R/C DEU KHONG DUNG DUOC ( LY DO : SAU KHI NAP PIN ( NI-MH 9.6 V 700 mAh ) BANG CUC NAP THEO MAY KHOANG 8 TIENG DONG HO , TOI DO DUOC HIEU DIEN THE CUA PIN LA 9.0 V , NHUNG TRONG QUA TRINH NAP KHONG THAY PIN NONG LEN ( CAC PIN KHAC AM AM ) VAY TOI KET LUAN RANG PIN KHONG NAP DUOC , MAC DU CUC NAP OK ( DA KIEM TRA CUC NAP ) , VAY CAC BAN CO LOI KHUYEN GI KHONG