SparkFun will be closed on Tuesday, December 24th, and Wednesday, December 25th, in observance of the Christmas holiday. Any orders qualifying for same day shipping placed after 2:00 p.m. (MST) on Monday, December 23rd, will be processed on Thursday, December 26th, when we return to regular business hours. Wishing you a safe and happy holiday from all of us at SparkFun!
Please note - we will not be available for Local Pick up orders from December 24th-December 27th. If you place an order for Local Pick-Up we will have those ready on Monday, December 30th.
This is an extremely tiny and light weight battery based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 40mAh. This may sound like not so much power, but the cell is really tiny... like, about half an inch square!
Comes terminated with a standard 2-pin JST-SH connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized Lithium Polymer charger. 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 for beginners.
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.
We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.
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