Home » WLtoys V977 / XK K110 K110S RC Helicopter Spare Parts Accessories 3.7V 520mAh 30C Upgraded Li-Po Battery WLtoys V977 / XK K110 K110S RC Helicopter Spare Parts Accessories 3.7V 520mAh 30C Upgraded Li-Po Battery WLtoys V977 / XK K110 K110S RC Helicopter Spare Parts Accessories 3.7V 520mAh 30C Upgraded Li-Po Battery. Sale price : $19.30 Category : Toys & Hobbies