What is the difference between 3S and 4S LiPo battery?

What is the difference between a 3S and a 4S LiPo battery? Power: A higher voltage battery can deliver more power (P=V×I). Moving from a 3S to a 4S battery on the same motor will result in higher motor RPMs and thus more power and speed.

Can I put a 4S battery in a 3S?

Think of this as a hard and fast rule. Your motor and ESC are designed to handle a specific amount of voltage. If your gear says it's for 3S (11.1V) max, and you plug in a 4S (14.8V) battery, you're force-feeding it way too much power. The result is almost always a fried ESC, a dead motor, or both.

How long will a 3S LiPo battery lastCapacity & Voltage Runtime Comparison

What is the 80 rule for LiPo batteries?

The 80/20 rule for lithium batteries recommends: Charge up to 80% for daily use. Charge to 100% only when needed, such as before a long trip or a full discharge cycle. Avoid letting the battery discharge lower than 20%.