how many amps should you charge a 4s battery with 3300 mah?

To charge a 4S battery with a capacity of 3300mAh, it is recommended to charge it at a rate of 1C. 1C refers to the charge rate equal to the capacity of the battery. In this case, 1C is equal to 3300mAh.

To convert 3300mAh to Amps, divide it by 1000:
3300mAh / 1000 = 3.3A

Therefore, the recommended charging rate for a 4S battery with a capacity of 3300mAh is 3.3 Amps.