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For those who have the Pi Zero W with them, what is its power consumption in the following modes:

  • No peripherals connected, WiFi And Bluetooth off
  • Only WiFi turned on
  • Only Bluetooth turned on
  • Only camera connected and capturing

I am aware of a previous question, but because it's older, that thread doesn't contain information about Pi Zero W and its specific features.

  • Just get a 2.1 ampere adapter. It will only take as much as it needs. Or you could buy a watt meter and find it out yourself, and post it here. – Dr_Bunsen Mar 18 '17 at 9:27
  • I am planning to build something that can't use a wall adapter. It will be used out in the field. Also, I don't have a watt meter, nor a Pi Zero W. Atleast not yet :) – HRJ Mar 18 '17 at 11:16
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    @Dr_Bunsen there is little need in invalidating this question. There are numerous reasons to be interested in the device's power consumption beyond just getting an adapter. As for your proposed alternative, well, we could close the whole StackExchange if we'd just recommend figure it out yourself for each question. – Ghanima Mar 18 '17 at 12:51
  • @Ghanima this wasn't meant to be a witty comment. It would have been the first thing I would have done, and I answered it from my perspective, not thinking about the possibility of someone not having a watt meter. – Dr_Bunsen Mar 18 '17 at 13:15
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    If you're interested by this information, I tested mine with this kind of battery and it lasted something like 18h15 with wifi on as an Access Point. – vmonteco Mar 20 '17 at 10:35
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Based on the measurements made by RaspiTV, here are some estimates:

100 mA: No peripherals connected, WiFi And Bluetooth off
160 mA: Bluetooth turned on
170 mA: WiFi turned on
230 mA: Camera connected and capturing

Overall, using WiFi and accounting for the 5V power adapter, you are only looking at 1.1 Watts.

  • Thank you for the link! I can see how you made some of the estimates from the linked chart. Still waiting for actual numbers. If I don't get them, I will mark this accepted. – HRJ Mar 18 '17 at 13:54
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    Wait. This measurements are on a per hour? per day? For example if I connect it on a 10 000mAh with no peripherals connected, WiFi and Bluetooth off it will last for 100 hours? or 100 days? – John Demetriou Jun 7 '17 at 14:19
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    @JohnDemetriou The mA measurements provided are invariant of time. A battery holding 10 000 mAh (note this unit introduces time as mA * hours) at 5V should be able to run this for about 100 hours. – jncraton Aug 30 '17 at 18:00
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    This assumes that the battery holds sufficient output voltage for its rated life. Some battery technologies can also vary depending on how fast they are discharged as well as variables like temperature and age and past usage patterns. – Richard Corfield Jan 17 '18 at 10:39
  • Thanks, I just set up my Pi-0W with pihole running headless on a random 700mA charger I had running around. I discarded 200mA as too likely to have low power problems under load. So far so good! Good to know for applications when people want to go with a lower output PSU. – jorfus Jun 29 at 23:32
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I'm currently testing my RPi Zero W with temp, humidity and barometric pressure sensors hooked up. I have two 3,000 mAh batteries wired in parallel. They also go through an Adafruit regulator. Once I had my python script running, I disconnected the keyboard and mouse since they won't be connected when my final project is finished.

In this configuration, i was able to get 8 Hrs and ten minutes on my RPi 3B in the exact same configuration. I'll know today how long the Zero W will run and I'll post it here.

Update: In the configuration mentioned, it ran just a hair, (5 minutes) over 14 hours. All it does is read the sensors once every 10 minutes and insert them into a MySQL table. I'm also running Lighttpd web service. Hope this is helpful.

If you decide to go with Lithiium/ion batteries, be careful; there is some real garbage on ebay and amazon claiming to be 9800 mAh. They're garbage. These are an honest 3000 mAh. Good luck.

  • How did your test go? – BonsaiOak May 17 '17 at 1:00
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    it's usually best to just get a 5000mah power bank (or larger) from a known place like amazon with genuine batteries (LG, samsung). usually they would use 26650 cells instead of 18650's so you get more capacity with one cell, though they're a bit fatter. fyi, rpi is over kill for temp/humidity. use an esp8266 for more than 14 hours battery life. – Eric Kelly Sep 20 '17 at 17:12

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