Charging external batteries type 18650 from usb , M5stack
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I want to do a project based on the M5stack and would like to inform myself if it is possible to recharge an external battery of type 18650 , 3000 mA/h , with the usb from the M5stack. I see in the documentation that is possible to 2.1 A , but I want to be sure .
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it should be possible if the battery is connected to the internal battery pins on the main pcb but it is untested.
hmn, I should look into it for one of my projects as that would save some extra hardware. -
We do not recommend you use the M5Stack Core to charge the 18650, it does not have battery protection. You can charge it with our PowerC product, which has a lithium battery protection circuit.
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@m5stack said in Charging external batteries type 18650 from usb , M5stack:
PowerC
Thank you for your feedback, ajb2k3 and m5stack.
The Power C is small for the actual project , it is probably better to use standard hardware for charging and only connect the 3.3v voltage on the M5stack. An example like the one I attach photo. But now I think, the output voltage I should use is the 3.3 v and not the 5v. That's it correct?
image url) -
@matorra I don't understand why you need to output 3.3V voltage. On the M5Core, it is powered by 5V.
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Thank you very much for your answers help me understand this hardware.
Yes, that's my question. Use M5stack regulator to power the M5Stack and not from charger .
In this case and, it is a last question about this, there will be no problems with the USB input if it is powered by an external battery. In some other case I have had problems connecting the USB, because both 5v sometimes are not exactly and that small difference produced power noises by connecting the USB, and sometimes reestorting the unit.Best regards
