A basic question on interpreting a battery ratings
3.8 V and 7.22 Wh does not tell you the max continuous current that you can draw out of it. There is another parameter called "C - rating" which gives you the max continuous current. This is how it works:

A 1000 mAh battery rated for 5 C will be able to give you 1000 mA X 5 = 5 A of continuous current.

In your case, the battery can be considered as 1900 mAh (7.22/3.8 mAh).

A lot of times, battery capacity is mentioned at 1C which means you should be able to draw a max of 1900 mA = 1.9 A continuously and it will discharge in 1 hour.

Li-po batteries will typically mention C rating explicitly: