LiPo batteries come with all kinds of numbers, ratings, and capacities. So, I wanted to take a moment to discuss the differences in 2S and 3S LiPos in simple terms. A 3S LiPo is more powerful than a 2S pack. Full stop. So, higher voltage batteries will have a higher “S” number. However,. There are three numbers you need to understand on a LiPo battery, and they are: 1. Voltage or S 2. Capacity or mAh 3. Discharge or C rating The voltage (S) is a measure of how powerful your battery is. So if your RC car or Plane has an ESC and motor that can. When you look at any LiPo battery, you will see the letter S on the pack. The S tells you how many cells the pack contains. So, a 3S. The difference between 2S batteries and 3S batteries is the voltage. Each cell in a LiPo pack provides 3.7 volts. To calculate the voltage of a LiPo pack, multiply 3.7 volts by the number. The “C” rating on a LiPo battery stands for the discharge rate. What you need to know is the higher the C rating, the better. High C rating.