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LiPo Battery Chemistry: C-Ratings and Discharge Limits
Lithium Polymer (LiPo) batteries are the standard power source for RC models due to their high energy density and discharge rates. The C-Rating represents how fast a battery can be safely discharged relative to its capacity.
The maximum continuous current (in Amperes) is calculated as: \(I_{\text{max}} = \frac{\text{Capacity (mAh)}}{1000} \times C_{\text{rating}}\). For example, a 2200mAh battery rated at 45C can supply: \(I_{\text{max}} = 2.2 \times 45 = 99\text{ Amperes}\) continuously. Exceeding this limit causes overheating, internal damage, gas buildup (puffing), and potentially fire.