Note: please use no more than 2A to charge the battery
 
Product parameters:
Battery capacity: 5000mAh 37wh
Battery voltage: 7.4v
Number of cells: 2 x 21700 Li ion 3.7V 18.5wh
Plug type: jst-xh and xt30 
Weight: 150g
Dimensions: 72mm x 42mm x 22mm

It can supply power for tx16s remote controller and expanded blacksheep 
 
Package included:
1pcs Original RadioMaster TX16S transmitter battery (2S 7.4V 5000mah)