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 it.
eBay