{"title":"SparkFun Battery Babysitter - LiPo Battery Manager","handle":"sparkfun-battery-babysitter-lipo-battery-manager","url":"/products/sparkfun-battery-babysitter-lipo-battery-manager","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!                  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 \nDatasheet (BQ24075 Charger) \nDatasheet (BQ27441-G1 Fuel Gauge) Arduino Library GitHub ","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11297,"title":"Default Title","sku":"SF-PRT-13777","price":49.05,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":58,"option1":"Default Title"}],"documents":[{"title":"SparkFun Battery Babysitter Schematic","type":"schematic","type_label":"Schematic","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDsgoBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--4cdcd4c5a20e22dd4cebf3278974668e1a328a32/sparkfun-battery-babysitter-v10-schematic.pdf","link":false,"file_extension":"PDF","file_size":198192,"description":"Full circuit schematic for the Battery Babysitter board."},{"title":"BQ24075 Charger Datasheet","type":"datasheet","type_label":"Datasheet","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDuAoBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--b1cdbbfec3fb219774991d764739c23319823234/bq24075.pdf","link":false,"file_extension":"PDF","file_size":2818957,"description":"Technical datasheet for the BQ24075 LiPo charger IC used on the board."},{"title":"BQ27441-G1 Fuel Gauge Datasheet","type":"datasheet","type_label":"Datasheet","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDvgoBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--b89888bf2c5f16b5ece6939d15eed7b0c942b0e6/bq27441-g1.pdf","link":false,"file_extension":"PDF","file_size":1044408,"description":"Technical datasheet for the BQ27441-G1 fuel gauge IC used on the board."},{"title":"SparkFun Battery Babysitter Eagle Files","type":"schematic","type_label":"Schematic","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDwgoBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--43dc543dbbe7a3799a6c8697326b170c2e1998c1/sparkfun-battery-babysitter-v10.zip","link":false,"file_extension":"ZIP","file_size":202096,"description":"Eagle PCB design files for the Battery Babysitter hardware."},{"title":"Supplier page — sparkfun.com","type":"supplier_description","type_label":"Supplier Description","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDxBoBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--1a3dcbb3e98e8729e7c5806d976a38c6ea32f277/sparkfun-battery-babysitter-lipo-battery-manager-sparkfun-com-2026-05-13.pdf","link":false,"file_extension":"PDF","file_size":844920,"description":"Snapshot of https://www.sparkfun.com/sparkfun-battery-babysitter-lipo-battery-manager.html (captured 13 May 2026)"}]}