Battery Babysitter LiPo Battery Manager

• Li Po Charger and Li Po Fuel Gage combined into one board
• 5V-tolerant I2C interface to fuel gage
• Fuel gage measures voltage, percentage, and current
• DIP-switch-selectable charge rates of 100 mA, 500 mA or 1.5A
• MicroUSB port for charging, or external options
• On/Off switch disconnects the battery for more power saving

The Battery Babysitter Li Po Battery Manager is an all-in-one single-cell Lithium Polymer (Li Po) battery manager. Its 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 gage. The charger supports adjustable charge rates of up to 1.5A, as well as USB-compliant 100 mA and 500 mA 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.