ESP3-S3-LiPo battery charge current

[maunope]

Hi!
I've noticed the battery charge current of this model is 100mA only, whereas the older ESP32 had a 2.2kohm R4, resulting in 455mA.

I'm using a 3000mA battery, which I understand is larger than the recommended 1400mA one, I was considering paralleling a resistor to R4 to be able to charge it in around 12h insteda of 30.
I understand the risk of messing things up/damaging my devkit, apart form this, is there any specific reason for esp32-s3 running 100mA instead of 455?

thanks in advance!

Maurizio

https://github.com/OLIMEX/ESP32-DevKit-LiPo/tree/master/HARDWARE/ESP32-DevKit-LiPo-Rev.D

https://github.com/OLIMEX/ESP32-S3-DevKit-LiPo/blob/main/HARDWARE/ESP32-S3-DevKit-LiPo_Rev_B/ESP32-S3-DevKit-LiPo_Rev_B.pdf

[LubOlimex]

It was mainly a design change since high current draw could limit down the current output for other peripherals attached to the board.

Another thing is that the battery charger chip might get very hot since 450mA is near the maximum it can provide.

My advice is to keep it as it is. Notice that it is not a problem to use 3000mA 3.7 Li-Po battery without any changes. It will just charge slower if it is severely discharged.

But of course you can also change R4 to smaller resistor in with 0402 size and it will have higher current for charge. My advice is not to go as low as 2.2k, maybe down to 3.3k (which is 300mA of current for charging).

[maunope]

Hey!
got it, thanks!

Maurizio