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Teardown: Xiaomi 45W Magnetic Power Bank Adopts GB 47372

The WPB1026S keeps a 13.2mm aluminium body and adds compulsory 3C certification, with two ATL cells, a CPW3261 PD controller and a 30W Qi stage.

Oct 27, 2026 · Dangel Technology editorial

China's mandatory power bank standard GB 47372-2026 was published on 31 March 2026, moving the category into compulsory 3C certification; uncertified units may not leave the factory. Xiaomi, one of the drafting companies, has migrated its Jinsha River magnetic line; model WPB1026S replaces WPB1025S, with changes centred on certification and packaging.

The body is a one-piece aluminium shell 13.21mm thick and 195.4g, at 102.05 by 70.56mm. Battery rating is 10000mAh at 36.77Wh (7.58V, 4850mAh), with USB-C input of 5V/3A, 9V/3A and 12V/2.5A. Wired output reaches 45W at 20V/2.25A, wireless covers 5W, 7.5W, 15W and 20W, with combined use capped at 15W.

A POWER-Z KM003C test shows PD3.2, PPS at 5-11V/4.1A, Xiaomi steps at 9-20V/3.0A and 2.25A, QC3.0, FCP, SCP, AFC and Apple 2.4A. Charging an iPhone 18 Pro drew 15.08V at 2.98A, or 44.86W. The bundled short cable carries an HP9610B eMarker rated 20V/5A.

Inside, two ATL 436678B cells of 4850mAh, 3.79V and 18.39Wh sit in series, each CCC-marked. The top board uses a CPW3261 USB-C and PD controller with a 48MHz 32-bit core, 128KB flash and 24KB SRAM, plus PPM8PN02R8 VBUS switches (-20V, 5.6mOhm) and PSM8PN03R4 buck-boost FETs (30V, 4.3mOhm).

The wireless path uses a WB8128 30W Qi transmitter supporting Qi2.2, MPP and Samsung profiles, 3.3-24V input and foreign-object detection, paired with a CPS1010 authentication chip carrying SHA256 and ECC. An SC8723 four-switch buck-boost converts 2.7-22V to 3-22V at up to 3.5A into four full-bridge FETs, and an HK51BS handles touch input.

The standard requires queryable status: connected to a PC, the official page reports remaining capacity, battery health, cycle count, per-cell voltage and temperature. That telemetry, not the power path, is where this revision differs from its predecessor.

Industry news compiled by Dangel Technology editorial from public reporting by Chongdiantou (charging industry media). Technical figures are reproduced as reported; verify specifications against the original source before design or procurement decisions.