UGreen 145W Power Bank 20,000mAh — measured review
The UGreen 145W 20K is the best usable-energy-per-gram pick, returning a measured 57.9 Wh while weighing just 387 g. It tops out at a single 100W port rather than dual, so choose it for one-device charging where weight matters most.
Tested · sample bought · rating 4/5 · how we test
| Rated energy | 72 Wh |
|---|---|
| Measured usable energy | 57.9 Wh |
| Measured efficiency | 80.4% |
| Max output | 100 W |
| Measured weight | 387 g |
| Passthrough | Yes |
Who it’s for
Choose the UGreen 145W 20K when weight is your top constraint and you charge one device at a time. If you need to sustain 100W on two ports simultaneously, the Anker Prime 20K is the better pick despite being heavier.
What we measured
Three discharge runs at 15W constant returned a mean of 57.9 Wh usable — lower total than the Anker, but at 387 g it delivers the most usable energy per gram in our 20,000mAh group. Only the primary USB-C port held 100W; the second capped at a measured 45W.
Test conditions
24C ambient, 3 discharge runs at 15W constant, retail sample. Full rig notes: power bank methodology.
Where to buy: Amazon