Capacitor smoothing question

Author	Message
matherp Guru Joined: 11/12/2012 Location: United Kingdom Posts: 11472	Posted: 10:47pm 09 Mar 2025       The simple way to roughly know a battery capacity is to weigh it. Take a known good battery of a known accurate capacity and get the weight. Scale this by the weight of a unknown battery allowing say a fixed 50% (could be more) of the good one for packaging and that will give you a good approximation of the unknown. e.g. known good 3000mAH @ 3500 weight unknown 2750 weight likely capacity (2750-1750)/(3500/2)*3000maH = 1700mah You will find the 9900mah battery is surprising light