The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. Its half battery charger, half battery monitor, and all youll 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 batterys voltage to estimate its charge percentage and remaining capacity. Its also hooked up to a current-sensing resistor, which allows it to measure current and power! Its a handy IC to have, if you ever need to keep an extra eye on your projects power draw.
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
- Eagle Files
- Hookup Guide
- Datasheet (BQ24075 Charger)
- Datasheet (BQ27441-G1 Fuel Gauge)
- Arduino Library
- GitHub
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