Capacitor smoothing question

Author	Message
lizby Guru Joined: 17/05/2016 Location: United States Posts: 3297	Posted: 04:09pm 10 Mar 2025         Mixtel90 said   C=1500Ah It will discharge to end point voltage in 1 hour at 1.5A C/20     It will provide 75mA for 20h If the second is true, it's unlikely that the first will be true. As I understand it, that's why reliable ratings of rechargeable batteries are typically quoted for a C/20 discharge rate. I have yet to see a Chinese 18650 battery or 12V 18650 battery pack which is rated accurately. I've been looking for a way to test this reliably--it looks like the circuit from @twofingers will do it. So there's something to be added to my already overflowing to-do list. The LiFePO4 batteries seem generally much closer to spec.