Welcome to Raspberry Pi Stack Exchange

Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for the Raspberry Pi. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to specific questions.

We're a little bit different from other sites. Here's how:


Ask questions, get answers, no distractions

This site is all about getting answers. It's not a discussion forum. There's no chit-chat.

Just questions...

...and answers.

up vote

Good answers are voted up and rise to the top.

The best answers show up first so that they are always easy to find.

accept

The person who asked can mark one answer as "accepted".

Accepting doesn't mean it's the best answer, it just means that it worked for the person who asked.

Will any external battery power a Raspberry Pi?

up vote 14 down vote favorite

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 power it for more than 24 hours?

2 Answers

up vote 4 down vote accept

As long as the power bank outputs 5V it will power the Pi.

It claims 50000mAh so it claims 2.5 amps per hour for 24 hours. Assume it will deliver half that so 1.25 amps for 24 hours.

If that is enough or not will depend on what you have connected and what the Pi is doing.

up vote 3 down vote

Sources on the Raspberry Pi forums say the Raspberry Pi uses approximately 500mA add in the 250mA for the camera module, and round for a safety margin equals approximately 1A. A 50,000mAh battery will run 1A for 50 hours. Even with additional safety margin that is plenty to run for 24 hours.


Get answers to practical, detailed questions

Focus on questions about an actual problem you have faced. Include details about what you have tried and exactly what you are trying to do.

Ask about...

  • Raspberry Pi hardware
  • Raspberry Pi peripherals
  • Software specific to the Raspberry Pi

Not all questions work well in our format. Avoid questions that are primarily opinion-based, or that are likely to generate discussion rather than answers.

Questions that need improvement may be closed until someone fixes them.

Don't ask about...

  • Anything not directly related to the Raspberry Pi
  • Questions that are primarily opinion-based
  • Questions with too many possible answers

Tags make it easy to find interesting questions

All questions are tagged with their subject areas. Each can have up to 5 tags, since a question might be related to several subjects.

Click any tag to see a list of questions with that tag, or go to the tag list to browse for topics that interest you.

Will any external battery power a Raspberry Pi?

up vote 14 down vote

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 power it for more than 24 hours?


You earn reputation when people vote on your posts

Your reputation score goes up when others vote up your questions, answers and edits.

+5 question voted up
+10 answer voted up
+15 answer is accepted
+2 edit approved

As you earn reputation, you'll unlock new privileges like the ability to vote, comment, and even edit other people's posts.

Reputation Privilege
15 Vote up
50 Leave comments
125 Vote down (costs 1 rep on answers)

At the highest levels, you'll have access to special moderation tools. You'll be able to work alongside our community moderators to keep the site focused and helpful.

500 Vote to close, reopen, or migrate questions
1000 Edit other people's posts
2000 Access to moderation tools
see all privileges

Improve posts by editing or commenting

Our goal is to have the best answers to every question, so if you see questions or answers that can be improved, you can edit them.

Use edits to fix mistakes, improve formatting, or clarify the meaning of a post.

Use comments to ask for more information or clarify a question or answer.

You can always comment on your own questions and answers. Once you earn 50 reputation, you can comment on anybody's post.

Remember: we're all here to learn, so be friendly and helpful!

up vote 9 down vote

As long as the power bank outputs 5V it will power the Pi.

It claims 50000mAh so it claims 2.5 amps per hour for 24 hours. Assume it will deliver half that so 1.25 amps for 24 hours.

If that is enough or not will depend on what you have connected and what the Pi is doing.

edit

Hi Joan, thanks for your answer. I want it to record from the Raspberry Pi camera module. Do you think this would work? ebay.co.uk/itm/… Also, what's the maximum SD card capacity for the Pi? - Joel Jan 10 at 21:59

add comment


Unlock badges for special achievements

Badges are special achievements you earn for participating on the site. They come in three levels: bronze, silver, and gold.

In fact, you can earn a badge just for reading this page:

 Informed Read the entire tour page
 Student First question with score of 1 or more
 Editor First edit
 Good Answer Answer score of 25 or more
 Civic Duty Vote 300 or more times
 Famous Question Question with 10,000 views

see all badges


Find a question to answer, or ask your own

Looking for more in-depth information on the site? Visit the Help Center

Raspberry Pi Stack Exchange is part of the Stack Exchange network

Like this site? Stack Exchange is a network of 149 Q&A sites just like it. Check out the full list of sites.

Stack Exchange