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Lithium Backpack

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PS… this one is for the Arduino Decimilia, Duemilanove and UNO. There’s also a Lithium BackPack that works with the Arduino Mega.

I’m sure you’ve built something cool, which, like any other cool gadget, would be a hundred times cooler if it could be taken more than 10 feet away from the computer. Whether portability is essential to your device or simply a matter of convenience, the Lithium Backpack lets you take your Arduino wherever you go…and have it turn on!

It’s not just about a battery—it’s about power options! As for power, the slim, long-lasting Li-ion battery delivers 9.4, 15, or 29 Arduino hours (Arduino on standby) and is mounted on a PCB that fits snugly onto the backside of an Arduino. Mike tweaked the circuit design to increase the backpack’s efficiency and decrease voltage ripple which means extra battery life to keep everything running smoother and longer on each charge.

What about the options? Well, you can charge it directly through a mini USB port mounted right onto the Backpack, or route it to charge through the core of your device. You can even monitor your own power consumption…try doing that with a standard 9V battery! I would say that the Lithium Backpack takes your device to the next level, but it’s not even about that. What would you say if someone gave you a phone or an iPod without a battery? I don’t know about you, but I would ask them why they stole my battery. Yeah…you need one of these.

Depending on how much juice you need, get these in low, medium, or high capacity.


  • Bare battery PCB matches the size of the Arduino
  • High Capacity 2200mAh Lithium Ion Battery (29 Standby Arduino Hours)
  • Medium Capacity 1000mAh Lithium Ion Battery (15 Standby Arduino Hours)
  • Low Capacity 600mAh Lithium Ion Battery (9.4 Standby Arduino Hours)
  • Rechargeable via Arduino USB
  • Rechargeable via USB Tybe-B Mini Cable
  • Supplies regulated 5V and 3.3V
  • Monitor battery voltage status


  • L x W = 2.73×2.10 inches (same as the arduino)
  • medium capacity battery height = 0.299 inches
  • high capacity battery height = 0.498 inches

Tutorials / Blogs


Get in touch if you have any questions, or ideas for something you want me to build.