3D Robotics Video/OSD Kit - Manual (Page 6)

Battery information
The transmitter and receiver are powered by 3-cell 11.1 V 900 mAh lithium
polymer (LiPo) batteries. Please charge the batteries before each use. Each
full battery provides approximately two hours of operation for your OSD/FPV
system.
Protect battery from extreme heat, extreme cold, puncturing, and flammable
surfaces. Charge battery using a designated LiPo balance charger only. Always
monitor battery while charging, and always fly with a fully charged battery.
Inspect battery for damage before takeoff and after landing. If you observe
any swelling of the package or the battery ceases to function, locate your local
battery recycling center to dispose of the battery. In the US and Canada, visit
call2recycle.org to find a location. Do not dispose of the battery in the trash.
To charge the batteries using a 3DR RTF charger, set the charger to LIPO
and 1A. Connect the white battery connector to the 3S port, and connect
the XT60-JST charger adapter to the red battery connector and yellow
charger connector.
LIPO 1A
*Charger not included with kit
3S port