Teardown: Baseus EnerFill 20000mAh 45W Dual-Cable Power Bank — IP5385 SoC, CBM8570 Gauge, 2S EVE Cells
2026-10-16 · Compiled by Best IT Parts from public industry reporting
The Baseus EnerFill (model E00370) is a 20000mAh 45W power bank with integrated USB-C and Lightning cables, certified under China's 2026 3C framework with cells that passed nail penetration, crush, overcharge and high-temperature testing. The nameplate reads 73Wh at 7.3V/10000mAh from two 10000mAh cells, with a rated capacity of 12000mAh at 5V/3A. Ports total 2C1A1L: USB-C input and output span 5V to 20V (20V/2.25A maximum), the Lightning lead handles 5V/2.4A and 9V/3A, and USB-A reaches 12V/1.5A and 11V/3A, with 5V/3A total output. The body measures 110.99mm x 68.36mm x 32.31mm and weighs 362.3g; the Lightning and USB-C tails measure 10cm and 18cm.
A POWER-Z KM003C reported UFCS 1.0, QC3.0, QC4+, FCP, SCP, AFC, PD3.0/PPS, DCP and Apple 2.4A on the USB-C port, with fixed PDOs of 5V, 9V, 12V and 15V at 3A plus 20V/2.25A and a 5.00-11.00V/5.00A PPS range. USB-A drops PD but retains UFCS 1.0, QC3.0, FCP, SCP, AFC and DCP. Charging an iPhone 18 Pro Max over the built-in USB-C cable measured 14.83V at 2.97A, or 44.06W.
Inside sit two EVE 136079GS3 pouch cells rated 3.65V, 36.50Wh and 10000mAh each, wired 2S. Conversion is handled by an Injoinic IP5385 synchronous buck-boost SoC that integrates the protocol stack, MCU and controller, supports 2-6S lithium-ion and LiFePO4 packs and reaches 100W with external FETs. The power stage uses four Wayon WMQ050N03LG4 30V/5.4mohm devices in an H-bridge, four WMQ46N03T1 30V/8mohm VBUS FETs, a 4.7uH inductor and two 25V/100uF NJcon filter capacitors, all in PDFN3030 where applicable. A CHIPSEA CBM8570 combines fuel gauging, protection and up to 20mA cell balancing, adds SHA-1/SHA-256 authentication and drives two CRMQTU0204B protection FETs. A CS32L011 Cortex-M0+ MCU and a Giantec N591 NFC front end expose state of health, cycle count and per-cell voltage in the companion app. Graphene spreaders and a thermal pad cover the board.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.