Part NumberDescription
BQ27441-G1System Side Li Ion/Polymer Fuel Gauge, PDSON-12
XC9148G50CER-GHighly functionality, 1.4A Step-up DC/DC Converters, USP-6C
BQ24072RGTUSB-Friendly Li-Ion Battery Charger and Power-Path Management, VQFN-16
nRF52833-QDAA-R7RF System on a Chip - SoC nRF52833-QDAA QFN 40L 5x5
USB6B15V Data line protection
74AHCT125PW,11874AHC(T)125 - Quad buffer/line driver; 3-state@en-us
MCP23018T-E_SS16-bit I/O Expander I2C interface
XC9291B33D1R-GHiSAT-COT Control Extremely Small 600mA Step-Down DC/DC Converters

leftside schematic

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