SparkFun Support and Front Desk will be closed on Thursday 11/14 from 1-2:30pm for a company event. Please plan to pick up your orders before or after this timeframe.
This is a very small, extremely lightweight battery based on Lithium Ion chemistry, with the highest energy density currently in production. Each cell outputs a nominal 3.7V at 400mAh! Comes terminated with a standard 2-pin JST-PH connector with 2mm spacing between pins. These batteries require special charging; do not attempt to charge these with anything but a specialized Lithium Polymer charger.
The battery includes built-in protection against over voltage, over current, and minimum voltage. Please use caution when using this battery in wearable projects. When using conductive thread, a short in the thread can create sparks and heat. We recommend using coin cell batteries.
Note: This battery is not available to ship to Alaska or Hawaii, or through any express services (2-day, overnight), or internationally. This is temporary! Check out our blog post for more information. Additionally orders may take longer to process and therefore do not qualify for same-day shipping. Sorry for any inconvenience this may cause!
Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please do not hesitate to contact us to see if further actions may be taken.
Based on 9 ratings:
They are self protected and more safe, my best ones !
Works well with the Battery Babysitter, powering a Pro Micro project.
worked as expected, and that is no small feat now a days
I had a pair of Ausdom M04 wireless headphones that stopped charging. Ausdom support was non-existent. So I took the headphones apart. The headphone battery was a KPL503030 - unavailable, even from the battery manufacturer unless I wanted to buy 500. I saw this battery via Google search and decided to give it a try. Works like a charm!
I purchased 3 Lipo 400mahr batteries and made an 11.1 volt pack by binding then together and connecting then in series. I'm using them to power an HO locomotive on my model railroad and it's working as designed. I'm using the appropriate charger and have had no trouble.
Working great. I am using it to power the SparkFin Wireless Joystick Board.
Small and compact and works great. I'll be using it to support a pool automation project. I'll come back and give it a 5 star if it holds up to the Phoenix summer heat. :-]
I have not owned many batteries in my lifetime but this has got to the one of the best batteries one could ask for. It's small and smooth and holds lots of energy. Also, it works very well with the Photon Battery Shield. I had no problems with running a microprocessor off this little thing. 12/10 would recommend.
Use these for GPS tracking and they last a good part of the day. Very reliable. Own several and none have failed yet!