ESP8266 Community Forum

- Mon Apr 20, 2015 7:31 pm #15164

That seems a great idea. You can insert only one battery and use the other battery's place for your components.
I'm powering an ESP-01 from a power bank like this (but the one with only one battery), with battery inserted. It reaches 4.2v while charging the battery and the ESP01 is still alive.

huh? what kind of single rechargeable battery reaches 4.2v? even 18650, LiFePO4 or lipo won't do that, or do you mean the voltage coming from the usb socket (into the batteries) which should be more like 5v @ 500mA

Just google it
BTW My LiPo cells do follow this curve...

- Tue Apr 21, 2015 12:50 pm #15215 I have the same case too.

All these module output 4.2v, which is the voltage of fully charged Li-ion battery.

ESP8266 can take 4.2V, I'v been running for a few months now.( Connect Lipo battery directly to ESP-07, ESP-12 )

Make something useful. 'Eat your own dog food' DevKit for IoT.
http://www.nodeusb.com