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REVIEWReview: JZ602 20,000mAh Power Bank With 55W Output and EVE Cells
A 74Wh model with a captive USB-C cable, 55W output, two series EVE pouch cells and full parameter reporting through a companion app.
Sep 20, 2026 · Dangel Technology editorial
The JZ602 is a 20,000mAh power bank rated at 55W output that carries certification under China's revised portable power bank standard. It integrates a braided USB-C cable that doubles as a lanyard, two USB-C ports, one USB-A port and a hidden display that shows remaining capacity as a percentage.
Nameplate ratings are 74Wh. Type-C input and output accept 5V/3A, 9V/3A, 12V/3A, 15V/3A and 20V/2.25A, with PPS steps at 5-11V/4.5A, 5-16V/3A and 5-20V/2.75A; USB-A covers 5V/3A, 9V/2A, 10V/2.25A and 12V/1.5A, and combined output is capped at 5V/3A. Protocol testing recorded PD3.0 with fixed 5V/3A, 9V/3A and 12V/1.67A PDOs, plus PPS, QC3.0/QC4+, FCP, SCP, AFC, DCP and Apple 2.4A.
The pack uses two series-connected EVE 126280GS3 pouch cells of 10,000mAh and 37Wh each at 3.7V nominal, cushioned by foam above, below and between the cells, for an equivalent 20,000mAh and 74Wh. Weight is 345.5g and dimensions are 112mm by 71.5mm by 30.94mm.
A companion app pairs over USB-C1 after three presses of the power key, reporting state of charge, pack voltage, current, cell temperature, live output power, battery health, per-cell voltage, protection status and an abnormal-event log.
Self-charging from a 70W adapter drew 20.51V at 2.25A, or 46.09W, and a full recharge took 4h28m, with 50 percent reached in 1h50m. An iPhone 17 Pro Max drew 38.42W, a Lenovo Xiaoxin Air 14 drew 42.02W and a vivo X300 Ultra on USB-A drew 17.11W.
Port sharing is heavily derated: two active ports split into 7.34W on the cable and 7.25W on USB-C1; three ports split into 7.37W, 7.28W and 2.29W. The 55W rating is a single-port figure.
Key points
- 20,000mAh and 74Wh, 55W output, 345.5g, new-standard CCC certification
- Two series EVE 126280GS3 pouch cells, 10,000mAh and 37Wh each
- PD3.0, PPS, QC3.0/QC4+, FCP, SCP and AFC; PPS up to 5-20V/2.75A
- Self-charge measured 46.09W; full recharge 4h28m from a 70W adapter
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.
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