Battery performance continues to decay as we use it, primarily in respects of capacity fading, power level dropping, and rising internal resistance etc. Internal resistance, in particular, is prone to the influence of working conditions including temperature and depth of discharge.

Battery performance continues to decay as we use it, primarily in respects of capacity fading, power level dropping, and rising internal resistance etc. Internal resistance, in particular, is prone to the influence of working conditions including temperature and depth of discharge.