> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# SparkFun Battery Babysitter - LiPo Battery Manager

**Type:** Product page · **SKU:** PRT-13777 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-battery-babysitter-lipo-battery-manager.html ([markdown](https://core-electronics.com.au/sparkfun-battery-babysitter-lipo-battery-manager.html.md))

The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.

## Pricing

- **Price:** $39.90 (inc GST) — $36.27 AUD, exc GST
- **Quantity discounts:** 5+ $35.18 (exc GST) · 25+ $34.45 (exc GST) · 100+ $33.01 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 80 more in 5–11 days.

## How to buy

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- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.

The Battery Babysitter features a pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The charger supports adjustable charge rates of up to 1.5A, as well as USB-compliant 100mA and 500mA options. It also features power-path management, guaranteeing power to your project even if the battery has died. The self-calibrating, I2C-based BQ27441-G1A measures your battery’s voltage to estimate its charge percentage and remaining capacity. It’s also hooked up to a current-sensing resistor, which allows it to measure current and power! It’s a handy IC to have, if you ever need to keep an extra eye on your project’s power draw.

[GET STARTED WITH THE BATTERY BABYSITTER GUIDE!](https://learn.sparkfun.com/tutorials/battery-babysitter-hookup-guide)

Features:

- LiPo Charger and LiPo Fuel Gauge combined into one board
- DIP-switch-selectable charge rates of 100mA, 500mA or 1.5A
- MicroUSB port for charging, or external options
- Dynamic power-path managment maintains a reliable output supply
- On/Off switch disconnects the battery for more power saving
- 5V-tolerant I2C interface to fuel gauge
- Fuel gauge measures voltage, percentage, and current
 
Documents:

- [Schematic](https://core-electronics.com.au/attachments/localcontent/sparkfun-battery-babysitter-v10-schematic_1981964e9f5.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/sparkfun-battery-babysitter-v10_20209e30221.zip)
- [Hookup Guide](https://learn.sparkfun.com/tutorials/battery-babysitter-hookup-guide)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/bq24075_2818952799c.pdf) (BQ24075 Charger)
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/bq27441-g1_10444d593eb.pdf) (BQ27441-G1 Fuel Gauge)
- [Arduino Library](https://github.com/sparkfun/SparkFun_BQ27441_Arduino_Library)
- [GitHub](https://github.com/sparkfun/Battery_Babysitter)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/r/prt-13777.jpg)