ESP8266 Community Forum

- Tue Nov 10, 2020 3:02 pm #89397 Hello,

I am trying to run my ESP01 directly on a battery.
It should be running blink sketch, but when powered by the battery it does not.
In the other hand if I use my USB to serial chip CH340 the code runs like expected.

here is the battery I am using. It's measuring 3.56V

https://imgur.com/a/fmCVJUC



I connected the pins directly to VCC and GND respectively.

Why doesn't the code run when using the battery?

- Tue Nov 10, 2020 5:03 pm #89398 What module are you using? And can you see what the regulator is?

Many of the modules out there us cheaper LDOs that have a large drop out voltage, which will not leave you enough to power your ESP - ESP8266 needs an absolute minimum of 2.6 volts

- Tue Nov 10, 2020 5:38 pm #89399 I am using ESP01

I thought about this after I posted, so I measured the voltage when the battery is connected to the ESP01 and it remains equal ( 3.5V ). Also worth mentioning the the red LED seems to work with the same intensity as when it's connected through the USB Adapter.

As for the battery I bought a couple years ago and it has nothing written on it, but it's a lipo battery.

Because the voltage is whitin the recommended input range I assumed it's not necessary to use a voltage regulator. Can you please confirm if this is the correct approach?

- Wed Nov 11, 2020 3:12 am #89401 My fully charged LiPo's go up to 4.2V.

I used voltage regulators on a couple of my projects but lose about 0.5V or 0.25V through it - Nodemcu and esp12-F. You can get voltage regulators with better efficiency.