Silergy SY6974B Battery Charger
The single-cell lithium battery charger on boards such as the Seeed Expansion Board Base for XIAO. It charges a connected battery from USB.
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About it
A Silergy SY6974B single-cell Li-Ion switching charger with I2C control at 0x6B. Seeed fits it to the Expansion Board Base for XIAO (103030356) from PCN20251119-010 onwards ("The PMIC is changed from ETA6003A to SY6974B", https://files.seeedstudio.com/wiki/Seeeduino-XIAO-Expansion-Board/document/PCN-103030356.pdf); older builds carry an ETA6003, which has no I2C at all. Seeed's reTerminal E10xx carries one at the same address. It is not sold on its own here.
Where to buy
No shop listed yet.
Facts
Tested
It is in our catalog, but nobody has checked it on a real board. It may not work yet. Its driver is written, but it has not been tested on hardware yet.
I2C address
The Silergy SY6974B Battery Charger answers at I2C address 0x6B. The address is fixed.
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This record was last changed on October 25, 2026.