<![CDATA[Unable to make T-Display S3 work with LiPo battery]]>Hello everyone,
I am using my Lilygo T-Display S3 to make an halloween project.
At the moment I'm just using the display to show something, and the device is powered by a powerbank via the USBC port. But I wanted to make the project smaller and portable.

So I bought 4x LiPo Batteries with its own re-charger, I have charged up the batteries and connected each of them to the T-Display S3 with the JST port: it won't powerup, no battery is working with the device. What am I doing wrong?

The LiPo batteries: https://www.amazon.it/dp/B087LTZW61?psc=1&ref=ppx_yo2ov_dt_b_product_details
Specs: 3,7 V 1100 mAh with Micro JST 1.25

The recharger: https://www.amazon.it/dp/B0BN3X7MX9?psc=1&ref=ppx_yo2ov_dt_b_product_details

]]>https://www.community.lilygo.cc/topic/711/unable-to-make-t-display-s3-work-with-lipo-batteryRSS for NodeWed, 15 Jul 2026 00:42:52 GMTMon, 09 Oct 2023 10:22:31 GMT60<![CDATA[Reply to Unable to make T-Display S3 work with LiPo battery on Wed, 26 Jun 2024 15:12:15 GMT]]>@swerwe123 I solved it with @RobLatour 's help. Glad to hear it helped!

]]>https://www.community.lilygo.cc/post/1874https://www.community.lilygo.cc/post/1874Wed, 26 Jun 2024 15:12:15 GMT<![CDATA[Reply to Unable to make T-Display S3 work with LiPo battery on Wed, 26 Jun 2024 11:13:27 GMT]]>Thank you so much for solving the problem with this topic. I was looking for it and got solution from it. Thanks

]]>https://www.community.lilygo.cc/post/1873https://www.community.lilygo.cc/post/1873Wed, 26 Jun 2024 11:13:27 GMT<![CDATA[Reply to Unable to make T-Display S3 work with LiPo battery on Wed, 11 Oct 2023 12:57:43 GMT]]>I confirm that this has solved my issue and mark it on the title for the posterity, many thanks!

edit: apparently titles cannot be edited after a while, if a moderator could add "[SOLVED]" to this thread's title, it would be helpful for others 🙂

]]>https://www.community.lilygo.cc/post/1260https://www.community.lilygo.cc/post/1260Wed, 11 Oct 2023 12:57:43 GMT<![CDATA[Reply to Unable to make T-Display S3 work with LiPo battery on Tue, 10 Oct 2023 10:13:02 GMT]]>@teastain2 Thank you! I will try when I get back home

]]>https://www.community.lilygo.cc/post/1255https://www.community.lilygo.cc/post/1255Tue, 10 Oct 2023 10:13:02 GMT<![CDATA[Reply to Unable to make T-Display S3 work with LiPo battery on Mon, 09 Oct 2023 15:32:41 GMT]]>Sounds like the ol' GPIO 15 must be turned on HIGH issue.
This enables the display power and the circuit that uses and re-charges the battery.
I made a support repository for new users here:
https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples
My examples are the simplest possible sketches that use the display, TFT_eSPI and Serial.print functions, as a sort of tutorial.
Hope this helps -Terry

If you are not running one of my sketches, you should add:

#define PIN_POWER_ON 15 // LCD and battery Power Enable
#define PIN_LCD_BL 38 // BackLight enable pin (see Dimming.txt)

just before the setup and then in setup add:
pinMode(PIN_POWER_ON, OUTPUT); //triggers the LCD backlight
pinMode(PIN_LCD_BL, OUTPUT); // BackLight enable pin

digitalWrite(PIN_POWER_ON, HIGH);
digitalWrite(PIN_LCD_BL, HIGH);

]]>https://www.community.lilygo.cc/post/1252https://www.community.lilygo.cc/post/1252Mon, 09 Oct 2023 15:32:41 GMT