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Forum Index : Microcontroller and PC projects : Capacitor smoothing question
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| lizby Guru  Joined: 17/05/2016 Location: United StatesPosts: 3252 |
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. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| twofingers Guru Joined: 02/06/2014 Location: GermanyPosts: 1455 |
 You might also look for zb2l3.I bought several from Ali-Express for about 2 EUR each. The circuit is trustworthy. The batteries to be tested can have up to 15 V. Two 7.5 ohm/5W resistors should be included. The threshold voltage (cut-off voltage is adjustable). This is probably the cheapest solution. Regards Michael Edited 2025-03-11 02:36 by twofingers causality ≠ correlation ≠ coincidence |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7339 |
Sorry lizby. :) 1500mAh of course. :) The best bet is probably not to buy "high capacity" 18650s from China. Then you'll probably be less disappointed... Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3252 |
Thanks. I ordered a couple of those. I do like the ability of your circuit to produce a graph. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| twofingers Guru Joined: 02/06/2014 Location: GermanyPosts: 1455 |
Yes, it really is fantastic! I like it a lot! Regards Michael BTW: I use this: https://www.printables.com/model/646235-enclosure-for-battery-capacity-tester-hw-586/related model for 3d-printing. And a 1 EUR charger as a holder for the 18650 battery.  Edited 2025-03-11 05:21 by twofingers causality ≠ correlation ≠ coincidence |
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