ESP8266 Community Forum

- Fri Nov 21, 2014 1:39 pm #3100

have you tried LD1117V33 ? i tried ams1117 3v3 its good but idle power conumption 3-4ma without esp.

I'd only use a regulator on the bench, so a few milliamps is not an issues but for actual operation as a standalone I'd switch to battery every time...

Looks like an LFP (lithium ferrophosphate) battery is the best option as it can be charge at 3.6 volts so the ESP should be fine, otherwise we need some very low current regulation... LiPo can supply current as you need it (surge) but not sure what charge voltages can be used... if fully charged the battery voltage exceeds 3.6 were back to regulation...

I'm guessing a lot of people will need answers to powering the ESP8266 if they want long life from a battery...

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- Mon Dec 01, 2014 8:27 am #3693 I had powered my ESP from the 3.3V rail of a Sparkfun Usb-serial adapter for a few weeks, with a 33uF cap across the power lines.

At first it worked OK, sometimes for a correct reboot multiple resets were required. Later the number of required multi-resets and unwanted reboots occurred more often. A few days ago it would not reboot anymore

Being fed up with the resets I replace the power to the ESP by 2 Eneloop NiMH rechargeable's. That cured all of my troubles, even without capacitor across the power lines.

I measured 2.59 Volts form the AA's, max power consumption I have seen (during a 1 minute test) is around 170 mA.

- Tue Dec 09, 2014 10:42 am #4386 How about the Lithium Thionyl Chloride Battery? (http://biz.maxell.com/en/product_primar ... &pn=pb0004) It's high capacity and capable for high discharge rate. But typical cell voltage is 3.6V, Anyone know is there risk if connect it directly to VCC pin of ESP8266 module? Thank you.

- Tue Dec 09, 2014 11:28 pm #4451 From memory and it's not good... I believe the maximum is 3.6 volts...
You could always use a series diode (4001) and drop about 0.6 volts to give close to 3.0

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