Questions tagged [battery]

In electricity, a battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

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5answers
2k views

UPS for raspberry pi

I want to be able to power my pi like a smartphone (ie from battery or from mains (while charging the battery), hot swappable) I know there are boards like the MoPi that achieve this, but the ...
4
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1answer
695 views

UPS for Raspberry Pi and router (TPLINK TD-W8961) [duplicate]

I have started hosting a website on my raspberry pi, but because of the power outages, and mostly because I'm itching for a DIY project I would like to build a UPS for my pi and my router(12v-1,5A). ...
2
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1answer
475 views

Power Pi from Li battery?

I would like to use a 4.2V(voltage varies from 3.6v up to 4.2v) Li battery to power a Pi - for this it seems like I would need a DC-DC boost converter. From what I found, all of those seem to create ...
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4answers
3k views

7.2V battery with Raspberry Pi

I want to use a 7.2V (4200mAh) battery with my raspberry pi but I need to convert the output to 5V (2000mAh), I tried the following formula: Ω = V / A but when I try to find the ohms the result is ...
2
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4answers
661 views

Using battery pack as a UPS

I need to use raspberry devices as mini servers. I'll need to install ~100 of them in different locations. In those areas, electricity power offs are quite common, so I'm thinking using a cheap usb ...
11
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2answers
67k views

How long does the RPi last on a battery? [duplicate]

For how long can the Raspberry Pi run when powered from a battery of a given capacity? Of course this will strongly depend on how it is used and what devices are connected, but I am trying to get a ...
0
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2answers
94 views

How to know when to pull the power from SSH

I've been playing around with my Pi on a battery recently. I have the Pi set up so that I can SSH into it. Using the standard commands(sudo shutdown -h now) to shutdown work at bringing the Pi down, ...
4
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3answers
287 views

Can I power my pi with an 800 ma/h battery?

I bought a rayovac portable charger. It outputs current at 800 ma/h, as stated on the product packaging. My goal here was to make my pi (model B) itself portable, as the battery outputs that current ...
0
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2answers
123 views

Battery packs without “blip”

The Battery pack I am using for the has just one problem... plug in the pack to charge the pack itself, and it blips, rebooting the pi (not the mention shutting down most ungracefully.) Are there any ...
9
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3answers
24k views

How to know how much battery power is remaining?

i got 2600 mAh powerbank for Pi and it manages to stay for some time for my use..But i want to avoid wrong shutdowns due to power failures so .. Which will be the best way to avoid power failure ...
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2answers
3k views

Estimated run time off of 9V

What would be the estimated run time off of parallel 9V batteries fed through a LM7805 5V regulator (no peripherals)?
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2answers
12k views

Battery Power Requirements

Is this Maplin Power Bank 4000mAh pwerful enough to power the Pi with all of the peripherals below? This is useful as I cannot order online, and it is currently £15. I have a Raspberry Pi Model B, ...
2
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2answers
1k views

battery power for RPI and IR LED bank?

I built a simple night vision set up using a model A RPI, pi NOIR camera, and car backup camera monitor. I made a simple infrared light by wiring 4 sets of 6 LEDs in series, so 24 total, let's see if ...
2
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2answers
1k views

How can I monitor power usage via the CLI?

On Ubuntu, there is a way to monitor power usage by a Linux device via the CLI and inside the task manager if it's a laptop. I am powering my Pi via a lead-acid battery, and I'd like to have a ...
3
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3answers
9k views

Battery powered Raspberry Pi [duplicate]

I am interested in using the Raspberry Pi in portable projects for data collection outdoors. How would I go about running the RPi on batteries? Have any software tools been developed to monitor ...
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4answers
2k views

Can I use a 5V battery as a UPS?

I have a few backup battery for my mobiles phones. Can I use one of them as a UPS? +--------------+ 5V | | +--------+ from ---> 5V backup | 5V | | ...
18
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3answers
22k views

Is it possible to detect input voltage using only software?

I'm a newbie to Raspberry Pi's, but one of the things I was thinking about doing is running it off batteries (I see many people do this) - that led me to concerns about shutting down gracefully. Is ...
3
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2answers
381 views

Battery Supply Question

This question may have been asked several times, regardless: It's been quite sometime since I took my electrical courses in tech school and had a question about battery powering my RPi. I currently ...
4
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4answers
6k views

Battery pack for model B RPI, Thoughts?

Thinking of getting the battery pack linked to below for my model b Raspberry pi, i am wondering if anyone knows anything about it and how could it is because for first glance it looks amazing. Thanks ...
7
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2answers
7k views

How long can a RaspberryPi run for on 4 or more AA batteries?

I'm looking to power my Raspberry Pi via rechargeable batteries, but I would like to know how long can it run with x number of batteries. I want to eventually be able to mount it outside and solar ...
1
vote
3answers
302 views

Peripheral power from battery

I'm having trouble powering my pi from 12v 2a battery. I made a circuit using 1117 linear regulator, it's supposed to give 1a current and 5v. Pi powers on normally but any peripherals that I connect ...
4
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2answers
684 views

Powering Portable Rpi

So I would like to have a laptop-esque setup with my rpi. I have my pi, my keyboard, and I want to buy a small USB monitor along with an external battery pack with USB ports. My question is to make ...
21
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6answers
67k views

How can I stress test my Raspberry Pi

I recently picked up a battery powered USB cell phone charger and I'm running some tests to see what kind of battery life I will get. Right now I'm just testing at Idle. I want to also run a test ...

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