![]() At higher C Rates some of the energy can be lost and turned in to heat which can result in lowering the capacity by 5% or more. It is important to know that even though discharging a battery at different C Rates should use the same calculations as an identical amount of energy, in reality there are likely to be some internal energy losses. The below chart shows the different battery C Rates along with their service times. ![]() The C Rating of a battery is important to know as with the majority of batteries the available stored energy depends on the speed of the charge and discharge currents. That same 10Ah battery being discharged at a C Rating of 0.5C will provide 5 Amps over two hours, and if discharged at a 2C Rate it will provide 20 Amps for 30 minutes. ![]() The capacity of a battery is generally rated and labelled at the 1C Rate (1C current), this means a fully charged battery with a capacity of 10Ah should be able to provide 10 Amps for one hour. The battery C Rating is the measurement of current in which a battery is charged and discharged at. A battery’s charge and discharge rates are controlled by battery C Rates. Figure 20.1 Illustration of simple sample size calculations.
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