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

learn more… | top users | synonyms

0
votes
0answers
18 views

Smart battery for Raspberry Pi?

I need some good battery for RPi (>5000mAh) having some possibility to get also battery capacity. Should I just rather have some intermediary element between 5V connector and RPi in order to check the ...
0
votes
1answer
24 views

Powering via a motion sensor using a battery pack

I'm new to Raspberry Pi and I had a few questions. I want to connect a raspberry pi to a e-ink display, it will retrieve content over wifi. It will only display when a motion sensor picks up on light ...
0
votes
1answer
22 views

Choosing the right converter

I'm having trouble calculating the right converter to buy in order to power a Raspberry 2 from batteries. I'm using 6 batteries (6x1.5V) so I guess I'll need to get an UBEC Converter like this one. ...
1
vote
0answers
27 views

Portable Power Supply [duplicate]

I need guidance on how to calculate how long I can power my Pi from an external power bank when I have USB and GPIO peripherals connected. I am considering buying this power bank pack. It says that ...
5
votes
3answers
161 views

Powering the Pi with 2 AA batteries

I've tested the Pi with a single 3.7V 18650 battery and this < 5$ power boost/power bank. It works, and this single battery runs for at least 1.5 or 2 hours. (Sidenote: during my tests, the ...
0
votes
1answer
119 views

Power Bank + raspberry pi 2, any throughts?

I am currently thinking about buying a Power Bank to use as a power supply for my Raspberry Pi 2. At the moment I am looking at the XIAOMI Power Bank 5V 2.1A 16000mAh. My questions are: Will it ...
0
votes
0answers
30 views

My Pi won't boot after battery defect

my Pi A+ won't boot. Both leds are always on, no blinking. This happends after connecting usb powerbank to gpio pins to power raspberry. My Pi got hot and then... just died. I tried to reflash microsd ...
1
vote
3answers
71 views

Power Raspberry with LiPo battery

I have a LiPo batterery: EZ-power LiPo 4000mah - 2s 7.4 How could I power the Raspberry, I just know that Pi works at almost 5V.
3
votes
1answer
117 views

Making batteries last for pi outside

I want to use the pi to analyze the moisture of my plants and decide to water or not. I want it set up in the garden. There is no power supply, so the pi will need to run on batteries. The plan is ...
1
vote
1answer
50 views

Problem when trying to get a DC motor to run using the L298N H-Bridge?

My setup is as follows: Using this motor controller board, I have one DC motor (I'm new to electronics, so I'm not sure when I say it's rated at 1.5V, because one 1.5V AA battery on its own makes it ...
1
vote
4answers
82 views

Can you use a Raspberry Pi to write code that powers an onboard LED or motor or fan? [closed]

In other words, is it possible to solder on an LED or a fan or a motor (perhaps even a custom-made piece of hardware) and then write software that can send power from a battery to the added device? ...
1
vote
1answer
114 views

How do I turn off my Rasperry Pi when it's connected to a battery pack?

I currently have my raspberry pi set up such that it's connected to this assembled 320x240 2.8" TFT + Touchscreen that I got from Adafruit (https://www.adafruit.com/product/1601). I am also powering ...
2
votes
5answers
657 views

Will a Duracell 9V battery power my Raspberry Pi for 24 hours? [duplicate]

Will a Duracell 9V battery power my Raspberry Pi (plus camera module) for 24 hours? I've tried power banks and the 50,000mAh rating seems a bit exaggerated, considering I'm getting just 5/6 hours ...
5
votes
5answers
4k views

Will any external battery power a Raspberry Pi?

I am working on a project that needs the Raspberry Pi to work without a mains connection. I have considered buying a 50000mAh USB power bank. Would this power a Raspberry Pi, and if so, would it ...
5
votes
0answers
267 views

Running RPi on Solar Panel and battery [closed]

I’m quite new in electronic projects and so my basics are quite limited. I've been reading a lot regarding this topic (refer to the title) and I’m currently planning to buy the suitable Solar Panel, ...
0
votes
1answer
80 views

Measure SoC (Juice left) in battery

I'm powering my raspberry pi with 2 no-break batteries. I want to know if is there any way for me to know how many percent of the battery is left. If is there anyway to measure it would be great so I ...
0
votes
2answers
46 views

Read load of battery via USB

I don't know if it is the right forum to ask the question but I just post it here. I have a power bank connected to my rpi b+ and I want to ask if it is in general possible to read the current load ...
0
votes
1answer
129 views

Viewing battery status Archlinux arm

I have a portable USB charger/external battery pack. The exact model is this one http://goo.gl/d9CgCa. My raspberry pi is running ArchLinux Arm. I am trying to view the battery status and other ...
2
votes
2answers
308 views

Portable power supply for a PiHub?

I love my PiHUB and would like to have a or table power source, so I can make my projects mobile :) Is there any product that I could use? It uses 3A 5.2V. Alternatively I'd appreciate any ...
2
votes
1answer
182 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
votes
1answer
170 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
votes
1answer
141 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 ...
0
votes
3answers
445 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 ...
0
votes
2answers
124 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 ...
2
votes
2answers
2k 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
votes
2answers
65 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
votes
3answers
179 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
votes
2answers
70 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 ...
0
votes
2answers
135 views

how to know how much battery power in 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 ...
2
votes
2answers
1k 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)?
5
votes
2answers
513 views

Battery Power Requirments

I have a Raspberry Pi Model B, which I plan to use build a small two-motor robot. The motors are powered externally by 4 AA batteries, and are to be controlled by at first by two large NPN ...
1
vote
2answers
694 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 ...
1
vote
2answers
236 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
votes
3answers
7k 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 ...
1
vote
4answers
1k 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 | | ...
5
votes
2answers
2k 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
votes
2answers
206 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
votes
4answers
4k 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 ...
4
votes
2answers
2k views

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

I'm looking to power my RaspberryPi via rechargable batteries, but I would like to know how long can it run for running X number of batteries. I want to eventually be able to mount it outside and ...
1
vote
3answers
222 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 ...
2
votes
2answers
557 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 ...
2
votes
3answers
3k 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 ...