Features: Compact and lightweight, easy to carry. Large capacity allows you to play your toys for a long time. Great battery replacement for your transmitter of toys. Flexible and stable, durable performance. Easy to install and release, very simple to use. Package Including 1 * 3.7V 1800mAh 25C lipo battery 1 * USB Charger Easy to plug in and out.Battery Size: 57*29*10mm ( L x W x H ). High quality and safe to use,safe in normal use,Easy operation, battery can be charged anytime without the need to fully discharge. Plug Type: JST Connector. Function: As a spare battery for a your RC Drone and can extend the playing time. Battery Volt:3.7V,Battery capacity: 1800mAh ,Please make sure yout RC Drone Battery are the same Voltage and same connector with the picture shows before you buy i.