esp8266 datasheet

http://www.seeedstudio.com/document/pdf/ESP8266%20Specifications(Chinese).pdf

https://nurdspace.nl/images/e/e0/ESP8266_Specifications_English.pdf

https://github.com/EspressifSystems/low_power_voltage_measurement/wiki

ESP8266 Power Consumption

http://bbs.espressif.com/viewtopic.php?t=133

1000mAh÷0.3mA÷24h÷31day÷12mouth=0.37year

低功耗开发指南
More details in documentation "2C-ESP8266__SDK__Programming Guide" Appendix "Low-power solution"
http://bbs.espressif.com/viewtopic.php?f=51&t=1023 cn
http://bbs.espressif.com/viewtopic.php?f=51&t=1024 en