MECO(TM) Syma S107 S107G RC Helicopter Upgrade 3.7V 240 mah Battery (Pack of 2) 240mAh 3.7v battery for S107G helicopter Pack of 2 The size of the battery is a little bigger, please make sure you don't mind it! ON SALE! Great Price! If you received defective items, please contact first, we will resend or refund.