compiler
Posts: 9
Joined: Mon Sep 09, 2013 10:09 pm

RPI + 10,000mAh Battery Running Benchmark

Mon Sep 09, 2013 11:19 pm

Im just posting this here in case it can help someone.

the hardware:

Raspberry Pi model B
Raspbian 2013-07-26 snapshot
Sandisk 64GB Class 10 SD card

the load:

Component video cable plugged (to a tv)
1 USB mouse directly into the RPI
1 USB keyboard directly into the RPI
Ethernet cable into a switch
NO hdmi / NO sound / NO cmos camera
software: Xwindows server (the graphical interface) + a top command
System load was nothing ( 0.02/0.05 @ 10m )

the battery:

Maker: Anker
Model: Astro3E
Capacity: 10000mAh
Delivers: 2 USB x 5V 3A (the 3A are shared, either 1x3A or 2x1.5A)
Battery was charged fully (obviously! :roll: )

results:

The Raspberry Pi managed to run for 17 hours and 12 minutes.

It shut down cleanly and without any stability problems.

The system was running fine until the last second.

Finally 10,000/17.20 = 581mAh

This RPI has been using *on average* 581mA
Last edited by compiler on Fri Sep 13, 2013 10:07 pm, edited 1 time in total.

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jbeale
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Re: RPI + 10,000mAh Battery Running Benchmark

Mon Sep 09, 2013 11:29 pm

Thanks for the detailed info on your test! Just one note, your average current units should be mA (milli-amps of current) not mAh (milli-amp-hours or battery capacity).

compiler
Posts: 9
Joined: Mon Sep 09, 2013 10:09 pm

Re: RPI + 10,000mAh Battery Running Benchmark

Fri Sep 13, 2013 10:11 pm

Edited, thanks for the fix.

Also, important for anyone working with lithium-ion batteries:

DO NOT COMPLETELY EMPTY ANY LITHIUM BATTERY

You may irrecoverably damage it :( .

After that test the battery took more than 24 hours to charge (usually takes 5-6hours), and it may have lost some capacity, so just be careful with what test you all do with lithium batteries. ( Apparently, mobile/tablets/etc shut down when there is still 5% juice in the battery to prevent damage. Driving it to 0% is very bad.)

r1b4z01d
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Joined: Tue Sep 10, 2013 2:45 pm
Location: Connecticut
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Re: RPI + 10,000mAh Battery Running Benchmark

Fri Sep 13, 2013 11:03 pm

Thank you for your posting your findings and risking your battery pack. I am working on RPi system for my car, I was planning on using a similar battery pack to keep it alive with out draining my truck's battery. Now You are now making me rethink my idea. I will more than likely have to have 4x the capacity to obtain the length of uptime I want to achieve.

compiler
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Joined: Mon Sep 09, 2013 10:09 pm

Re: RPI + 10,000mAh Battery Running Benchmark

Mon Sep 16, 2013 4:34 pm

r1b4z01d wrote:Thank you for your posting your findings and risking your battery pack. I am working on RPi system for my car, I was planning on using a similar battery pack to keep it alive with out draining my truck's battery. Now You are now making me rethink my idea. I will more than likely have to have 4x the capacity to obtain the length of uptime I want to achieve.
Well, there are a number of things you can do:

- Model A (no ethernet and only 1 usb port) is reported to use only 1/3 of the power model B uses, that is a huge savings) (Im prototyping in model B, but will get a model A for the final shape of my project just to save power.)

- Turn off hdmi and rca ports. If you dont need a screen, you can turn them off. I believe each one will save about 40mA. (I read that, havent tested it myself yet).

If you can get away with model A, then it is happy times:

17*3 = 51 hours running from 10,000mAh

Get 2 of those 10,000mAh for 102 hours uptime! 4 days and 6 hours!

TechyBen
Posts: 5
Joined: Tue Aug 27, 2013 6:33 pm

Re: RPI + 10,000mAh Battery Running Benchmark

Mon Sep 23, 2013 12:27 pm

How would I turn off the HDMI ports etc? I have a model B with 512 ram, and am looking to use it as a portable gaming machine. So the better the battery life, the better the experience. :)

b0rd2dEAth
Posts: 1
Joined: Wed Feb 11, 2015 8:59 am

Re: RPI + 10,000mAh Battery Running Benchmark

Wed Feb 11, 2015 9:04 am

I'm wondering how long a Samsung 50000mAh Power Bank Battery would keep a RPI running.. Also am wondering if since Samsung is a trusted brand their battery will actually have 50000mAh.

quintonish
Posts: 3
Joined: Mon Aug 03, 2015 7:18 pm

Re: RPI + 10,000mAh Battery Running Benchmark

Thu Sep 03, 2015 2:48 am

TechyBen wrote:How would I turn off the HDMI ports etc? I have a model B with 512 ram, and am looking to use it as a portable gaming machine. So the better the battery life, the better the experience. :)
You can configure the HDMI ports by editing the /boot/config.txt file on the SD card (essentially the BIOS). This can be done by plugging the card into another computer in case you mess up :)

Check out http://elinux.org/RPiconfig#Video_mode_options

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mahjongg
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Re: RPI + 10,000mAh Battery Running Benchmark

Thu Sep 03, 2015 7:48 am

"turning off" HDMI doesn't safe much energy. But energy will be saved automagically by not using the GPU, which will power itself down when you do.

gordon77
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Re: RPI + 10,000mAh Battery Running Benchmark

Thu Sep 03, 2015 8:02 am

mahjongg wrote:"turning off" HDMI doesn't safe much energy. But energy will be saved automagically by not using the GPU, which will power itself down when you do.
'automagically' :D

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