ESP8266 powered by battery

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Hi,
has somebody experiences in running a esp8266 on battery power? I want to built flexible room sensors powered by a battery, e.g. 9V connected to a voltage regulator. The room sensor should not be always on. It should send the values every 2 or 5 minutes.

As I know the ESP8266 consumes to much Power for a use with batteries. Because the WLAN Modul is needs for sending a lot of Power.
For this is an Arduino Nano with 3.3V + an NRF24l01+ LNA better (see the MySensor Projekt).
But when you don’ t allow the sleep mode the battery will run out of power verry soon.

with deepsleep and with an 18650 battery it will last maybe few weeks.
but for barrery powered sensors the esp consumes too much energy.

better to use mysensors.org (with arduino) with the mysensors plugin
https://pimatic.org/plugins/pimatic-mysensors/

ESP8266 with 3 AA batterys and 10 minute deepsleep, wakeup -> send value -> deepsleep is 3 to 4 weeks max.

Ohhh okay, that is to less. Thx for the info!

we already discussed and tested that in the espimatic category here at the forum.
you really do not need to scroll through our findings but if you are interested
https://forum.pimatic.org/topic/1500/espimatic-battery-issues

I think a promising approach is to use a microcontroller to drive the power supply of the ESP to get the standby power drain down to aprox. 5µA. See http://homecircuits.eu/blog/battery-powered-esp8266-iot-logger/

However, if you want a measurement interval of 5 minutes the battery drain is perhaps still too high and conventional batteries will be dead after 30 days. Perhaps, this can be further optimized with a tweaked ESP board (e.g. remove power LED if any) or an ESP board with lower drain. Anyhow, the typical drain during the busy cycle will be about 150 mA for a few seconds which it takes to connect to network and to send the measured data

ESP8266 WiFi - Low Power Door Switch Monitor 1uA
https://www.youtube.com/watch?v=-HtSMk6jyEo