These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 1000mAh! 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 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](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. **Weight:** 22g (0.77oz) **Features:** * Excellent long-term self-discharge rates (<8% per month) * Robust power source under extreme conditions (-25 to 60C) * 2.00 x 1.32 x 0.23" (50.8 x 33.5 x 5.9 mm) **Documents:** * [Datasheet](https://cdn.sparkfun.com/assets/5/6/e/1/5/SPE-DTP603450-1000mah-3.7V-En-1.0V.pdf) * [JST Connector](http://www.sparkfun.com/datasheets/Prototyping/Connectors/ePH.pdf) * [MSDS](https://cdn.sparkfun.com/datasheets/Prototyping/MSDS%20603450.pdf) https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2016-04-14 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2016-11-26 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2016-11-28 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2016-11-29 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2016-12-09 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2016-12-13 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2017-11-24 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2017-11-28 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2018-11-21 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2018-11-27 https://elecena.pl/product/6017044/lithium-ion-battery-1ah 2022-02-21