Lithium Ion Battery - 850mAh
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These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 850mAh! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized LiPo 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](https://www.sparkfun.com/search/results?term=coin+cell+battery) 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](https://www.sparkfun.com/news/2248) for more information. Additionally orders may take longer to process and therefore do not qualify for [same-day shipping](https://www.sparkfun.com/support#Same-DayShipping). 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.
**Features:**
* Excellent long-term self-discharge rates (