ESP8266 Community Forum

From their spec:

Maximum quiescent current: 0.1 mA

Flexible, even good, but not so ideal.

There is no need for a step-up since the esp will be happy with the 3xAA even when they are about to die at around 3v.

i have ESP-13.

I think i will just try with 3AA. Just to see how it works.

But later on i will try combination with solar cell and AAs.

I'm curious to see what would happen with a regular 9v battery and a little buck switching supply to get down to 3.3v. Those things last a long time in smoke detectors

tkdcal wrote:I'm curious to see what would happen with a regular 9v battery and a little buck switching supply to get down to 3.3v. Those things last a long time in smoke detectors

9V battery has a very little capacity. The smoke detector power consumtion is almost nothing.
ESP8266 is a hungry beast because of WIFI, peak at 200-250mA. I expect no more than few hours in case of continous run.

Take a look here, for a 9V battery datasheet: http://data.energizer.com/PDFs/522.pdf

And a general comparation table: http://www.powerstream.com/9V-Alkaline-tests.htm