ESP8266 Community Forum

- Wed Jan 28, 2015 5:15 am #8393 I found NiZn rechargeable aa battery. It has some differences with nicd or nimh battery. It's 1.85v for fully charged and nominal working voltage is 1.6v. 2xaa=3.2v absolutely fine . I measured working voltage esp8266 with ds18b20 and it's successfully working under 2.4v.
Has Anyone tried Ni-zn batteries?

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- Wed Jan 28, 2015 3:20 pm #8420 Thanks for the tip! I ordered some AAs and will try them in an ESP8266 application.

- Wed Jan 28, 2015 4:24 pm #8423

Thanks for the tip! I ordered some AAs and will try them in an ESP8266 application.

please remember. you need some discharge before use. fully charged voltage 2x1,85=3.7v discharge for 3.6v

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- Sun Feb 15, 2015 6:15 pm #9874 I received the NiZn batteries and charger I ordered. Both are the BPI brand, like this one: http://www.ebay.com/itm/331245772349. As you mention, they put out 1.85V fully charged. I took a chance and connected a pair directly to an ESP-201 module.

Code: Select all> print(node.readvdd33())
3734
>

As you can see, it did not burn up. 3.7V is only about 12% high, so perhaps it is OK to run the chip at this voltage. There is an internal regulator for the core as I recall. Maybe I will test battery life in a sensor node next week.