# Lithium Ion Polymer Battery with Short Cable - 3.7V 350mAh

**Type:** Product page · **SKU:** ADA4237 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/lithium-ion-polymer-battery-with-short-cable-3-7v-350mah.html ([markdown](https://core-electronics.com.au/lithium-ion-polymer-battery-with-short-cable-3-7v-350mah.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

Lithium ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light and powerful. The output ranges from 4.2V when completely charged to 3.7V. This battery has a capacity of 350mAh for a total of about 1.3 Wh. If you need a larger (or smaller!) battery, [Adafruit have a full range of LiPoly batteries](https://core-electronics.com.au/#)

The batteries come pre-attached with a genuine 2-pin JST-PH connector as shown and include the necessary protection circuitry. Because they have a genuine JST connector, not a knock-off, the cable wont snag or get stuck in a matching JST jack, they click in and out smoothly.

The included protection circuitry keeps the battery voltage from going too high (over-charging) or low (over-use) which means that the battery will cut-out when completely dead at 3.0V. It will also protect against output shorts. However, even with this protection **it is very important that you only use [a LiIon/LiPoly constant-voltage/constant-current charger to recharge them](https://core-electronics.com.au/#) and at a rate of 350mA or less.** [We suggest Adafruit's Micro Lipo charger, which has a 100mA default rate.](https://core-electronics.com.au/adafruit-micro-lipo-usb-liion-lipoly-charger-v1.html) Like most lipos, the batteries Adafruit sell do not have thermistors built in. This is why we suggest charging at 1 C or even less - 100 to 350mA is a good rate, and available from any USB port if using a USB-powered charger

**Additional safety notes:** Do not use a NiMH/NiCad/lead-acid charger! Also, do not abuse these batteries, do not short, bend, crush or puncture. **Never charge or use unattended. Always inspect batteries and surrounding circuitry constantly for any damage, loose wiring, or possibility of short circuits.** Polarity matches all Adafruit LiPoly/LiIon chargers and boards, other brands may have reverse polarity and can destroy your battery. As with all Lithium ion polymer batteries and with any power source - they should be used by experts who are comfortable working with power supplies.

## Technical Details

Details:

- Weight: 9g
- Size: 55mm x 25mm x 3.0mm
- Power Lead Length: 25mm
- Output: 350mAh at 3.7V nominal[​](https://cdn-shop.adafruit.com/datasheets/523334%20500mAh.pdf)

Product Dimensions: 55.0mm x 25.0mm x 3.0mm / 2.2" x 1.0" x 0.1"

 ![](https://core-electronics.com.au/includes/templates/shop2019/images/rohs_icon.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/4/2/4237-01.jpg)