Monitor battery charge of a charging board

Projects General Guidance
1

hello
my project is about at the same time charging a lithium battery with a charging board and using the output of the charging board to power an android smartwatch
i would like to connect an esp32 to the charging board to get the battery level and communicating with bluetooth the charging percentage to the android smartwatch

this is the charging board i use : DollaTek 18650-board double module mobile usb 5v 2.4a carte de chargeur de batterie 18650-lithium avec surcharge de surcharge protection contre les courts-circuits bricolage carte usb : Amazon.fr: High-Tech
i use the usb output to bring power to the android smartwatch
the battery : DC 3,7v 10500mah 1060110 Remplacement de la Batterie Lithium - ION Polymer pour DIY 3.7-5v Electronics, GPS, LED, Bluetooth Speaker, Mobile Power : Amazon.fr: High-Tech

thanks

2

There is excellent information on this forum. There is a lot of incorrect information as well. You will know when you find the correct info by reading the explanation.
NOTE: That is a very large (contains a lot of energy) battery of one of the most dangerous types. You will want to carefully monitor it as it could cause a bad fire. The charger you mention is for a completely different battery so you might want to re-think that.

3

can you give me an example of battery adapted to the charging board ?

4

Sorry, I don't know what you mean. Please re-phrase.

5

you say : "The charger you mention is for a completely different battery"
do you have a link to a battery for this charger ?

6

I just noticed, the board you mentioned is for producing 5V and does NOT appear to be a LiPo charging circuit.

7

i don't want to charge lipo, i want to charge Lithium - ION Polymer

8

LiPo is the acronym for Lithium Ion Polymer

9

ok but actually it works, i am charging the LiPo battery
the charging board is for : 18650-lithium
is it different ?

10

No.
The charging board you show will charge the battery you show.
However, the charger board does not have a battery charging percentage output to connect to your esp32.

11

hello thanks you so much for your response
i found others models in amazon

and this one

how can i find if there is a battery charging percentage output ?
if the information is displayed in the LCD screen, is there a way to get the information ?

12

Read the specifications.

if the information is displayed in the LCD screen, is there a way to get the information ?

Do the specifications say there is an output?

13

they don't provide detailed specifications on the amazon website
i am searching for more informations in others websites

more informations on aliexpress but not the one regarding batery percentage output
https://fr.aliexpress.com/item/1005005866843587.html?gatewayAdapt=glo2fra

this one is more detailed
https://fr.aliexpress.com/item/1005007876332030.html?spm=a2g0o.productlist.main.58.395dQ8kTQ8kTvq&algo_pvid=e9bdcd1a-f94f-4b33-8ea2-13dcb58b7557

image
image960×960 125 KB

14

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.