Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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.

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

There are two types of batteries:

  • Primary batteries (disposable batteries), which are designed to be used once and discarded
  • Secondary batteries (rechargeable batteries), which are designed to be recharged and used multiple times. Batteries come in many sizes, from miniature cells used to power hearing aids and wristwatches to battery banks the size of rooms that provide standby power for telephone exchanges and computer data centers.
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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 there a software only solution that would allow me…
Aerik
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Raspberry Pi battery state?

I use a power bank to power my Raspberry Pi, and I want to create script to turn off the Raspberry Pi when the battery level is low, but I cannot find any command to visualize the battery level. I don't know if is possible. Does such a command…
Benjamin Lizarraga
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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)?
Fearless
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Battery powered Raspberry Pi

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 battery power similar to a laptop?
cspirou
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Am I Correctly Calculating mAh for the Pi?

I am trying to figure out what size battery I will need to power my RPi and 2 components with it. I want to build a "tablet" of sorts, mainly because I don't want to spend $800 on a Wacom tablet when I can spend $200-$300 building my own (The point…
Alexis Evelyn
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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 power it with a USB wall charger. Works great, no…
0xhughes
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Controlling a backup battery after shutdown

Connected to my pi is an adafruit fona (a cellular phone), and a manhattan usb hub with external power. My pi, as well as the fona, are connected to a 3.7V 1200mAh backup battery. The pi is configured to detect when the AC power supply is…
Skyler
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Running/charging batteries on the RPi3

I have a standalone RPi3 inside a case where I've designed room for a couple servos and a battery pack of some kind. The mini USB port is accessible thru the case wall, and I could also make the 4 standard USB ports available thru it. Q: Is there…
mbewley59
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Battery monitor

I would like to build up a 'smart' battery for my RaspberryPi 3 and integrate it trough the OS. The electronics part is the easy task in this game. The complicate task (for me) is to find out how to share data coming from the 'smart' part of the…
weirdgyn
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Solar Panel + Raspberry Pi B+ Revision 2 compatiblility?

Is the following product compatible with the new B+ revision? http://www.ebay.in/itm/Neewer-Solar-Panel-USB-Charger-For-Cell-Phone-MP3-PDA-/151730255896?pt=LH_DefaultDomain_203&hash=item2353d3f818 The kit I am talking about is the…
Shritam Bhowmick
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Portable Power Supply

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 is delivers: Output: USB1: 5V/1.0A ; USB2: 5V/2.4A…
NULL
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Running a Raspberry Pi from a car battery using a Witty Pi 3 (sanity check)

I'm not totally certain that I understand what a Witty Pi 3 Rev2 does so this is by way of a sanity check that I have got it right. The documentation says "Thanks to the on-board DC/DC converter (MP4462), the Witty Pi 3 Rev 2 can accept input…
Haydon Berrow
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Which is the most energy efficient language to develop an apllication for Raspberry Pi?

I have a Raspberry Pi that runs under a power bank (battery) of 10.000 mAh. I want to develop and application which does non-blocking IO from the USB port and sends data over network to accumulation server. The first choice was to develop this app…
yiorgos
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Powering Pi from solar for monitoring (intermittent monitoring Ok)

I am looking to setup a remote Raspberry Pi to monitor water levels in a tank. There is no power supply but Wi-Fi should be ok. 1 reading a day would probably be fine but we could maybe do it every hour. I am wondering what solutions there are out…
Roaders
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Shutdown on low power with INA219 UPS HAT

I have a Uninterruptible Power Supply HAT For Raspberry Pi (bought here https://www.cytron.io/p-uninterruptible-power-supply-hat-for-raspberry-pi) and there is an INA219 chip on it. I'm using a python script to read from the I2C and it…
JScoobyCed
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