# Finding Parts **URL:** \ **Category:** Finding Parts\ **Created:** [14 January 2022 00:22 UTC](https://forum.core-electronics.com.au/t/finding-parts/12771 "2022-01-14T00:22:28Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![Liam](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/liam/32/3562_2.png) [@Liam](https://forum.core-electronics.com.au/u/Liam)\ **Post date:** [14 January 2022 04:16 UTC](https://forum.core-electronics.com.au/t/finding-parts/12771/4 "2022-01-14T04:16:07Z")
Hi Johan, Unforunately Jaycar doesnt seem to have a spec on the current usage of the board, we could speculate using [the datasheet from Espressif](https://www.espressif.com/sites/default/files/9b-esp8266-low_power_solutions_en_0.pdf) although to get a much more accurate estimate it would be best to measure the power usage using an accurate power meter such as the [Qoitech Otii Arc](https://core-electronics.com.au/qoitech-otii-arc.html). Then picking your battery is as simple as average power draw Since a LiPo’s voltage drops as it discharges you’ll need a converter to step it up to a usable voltage for the breakout board you are using, I’d recommend one of the powerboost modules, the lower the quiescent current the better > **[PowerBoost 1000 Charger - Rechargeable 5V Lipo USB Boost @ 1A - 1000C](https://core-electronics.com.au/powerboost-1000-charger-rechargeable-5v-lipo-usb-boost-at-1a-1000c.html)** > > The PowerBoost is a USB charger for any single cell (3.7V/4.2V) LiPo/LiIon battery which can power another USB device at the same time. Measuring how much current the system uses at each point is essential for choosing your battery. Sam wraps up the whole topic perfectly in this guide, > **[How to Conserve Battery Life with IoT Projects - Tutorial Australia](https://core-electronics.com.au/guides/how-to-conserve-battery-life-with-iot-projects/)** > > If you’ve ever created a project that uses batteries, you’ll be well aware how hard it can be to decide on elements in the project which can affect the battery life. You end up ‘umming’ and ‘ahhing’ for ages about whether you should use LEDs as... Without being topped up a new variable comes into play being the internal discharge of the battery, luckily LiPo’s have a relatively low internal resistance. > **[Self-discharge](https://en.wikipedia.org/wiki/Self-discharge)** > > Self-discharge is a phenomenon in batteries in which internal chemical reactions reduce the stored charge of the battery without any connection between the electrodes or any external circuit. Self-discharge decreases the shelf life of batteries and causes them to have less than a full charge when actually put to use. > How fast self-discharge in a battery occurs is dependent on the type of battery, state of charge, charging current, ambient temperature and other factors. Primary batteries are not... Turning on and using the WiFi radio consumes a lot of power, if you can get away with it storing the time/button press status and uploading a whole day/week at once will let you extend the battery life even more. I won’t be able to spec a specific battery that will be able to last X(without all of the data) amount of time but using the guides and advice linked above you’ll be able to navigate through the maths and select one! PS: there are lots of other forum topics here that discuss something similar, I’d take a look around and uncover some other nuggest of information, here’s a few good ones: > [@Battery requirements for ESP8266](https://forum.core-electronics.com.au/t/battery-requirements-for-esp8266/12395/3): > > This is quite a large range. If you can provide details of the DHT10 & ESP8266, ie pics would help. If the devices you have are similar to what is linked below then you need something that generates 5V. 4xAAA’s would do that 2xCR2032s would not. Knowing the voltage requirements of the devices would help greatly in providing advice. Something like this would provide enough power and is 5V output, but it is quite large. L=95.0mm W=26.5mm H=22.0 Generally power banks will not output at … > **[Datalogging Weather Station (Battery Powered) - Tutorial Australia](https://core-electronics.com.au/projects/datalogging-weather-station-battery-powered/)** > > This project will measure atmospheric conditions (Temperature, Humidity, Air Pressure) and log them to an SD card over a long period (months!) while running off a few AA or AAA cells. > Usually, projects powered by an Arduino Uno are quite power hungry... Liam. --- _[View the full topic](https://forum.core-electronics.com.au/t/finding-parts/12771)._