Whr battery units need to be converted into mAh, and only the working voltage of the battery needs to be manufactured. Taking iPhone 6 as an example, the standard capacity information of built-in battery capacity is: working voltage 3.82V, capacity 6.9 1Whr. According to the calculation formula: mA = WHr/ voltage×1000, it can be calculated that the battery capacity of iPhone6 is about 18 10mAh. 1 ma = 1 ma x 1 hour.
Milliampere rate formula
1A (ampere) =1000 ma (milliampere)
1mA (ma) = 1000μ a (ma)
1ma = 10-3a (ampere), that is,1ma = 0.001a.
1a= 10^(3)ma= 10^(6)μa= 10^(9)na
That is,1a =1000 ma =1000000 μ a =10000000 na.