Data table
High-Capacity Power Banks (20,000mAh+)
10 of 19 power banks we researched claim 20,000mAh or more — sorted by claimed capacity.
Power banks claiming at least 20,000mAh of capacity, sorted highest first. Remember that claimed mAh is the cell rating, not the energy you'll actually get out through a USB-C port — see the ratedWh and testedBy columns for the honesty context.
| Manufacturer-stated cell capacity, not a lab-measured deliverable figure | Maker-published where available; otherwise computed at nominal 3.7V/cell (flagged in basis) | Ports | Rated Wh at or under the 100Wh US carry-on limit | Independent test Citation to a specific independent teardown/measurement article for this model, where one exists | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Anker | Prime Power Bank (27K, 250W) — A1340 | 27650 mAh | 102.3 Wh | 250 W | 2x USB-C, 1x USB-A | PD 3.1 | 665 g | $219.99 | — | — |
| Zendure | SuperTank Pro 26,800mAh 100W | 26800 mAh | 99.2 Wh | 100 W | 4x USB-C (2x 100W in/out, 2x 20W out-only) | PD 3.0 | 567 g | — | ✓ | — |
| Shargeek (Sharge) | Storm 2 25,600mAh 100W | 25600 mAh | 93.5 Wh | 100 W | USB-C, USB-A, adjustable DC out | PD 3.0 | — | — | ✓ | Notebookcheck hands-on (notebookcheck.net/Shargeek-Storm2-and-Storm2-Slim-hands-on-review): independent hands-on covering the transparent-shell design and IPS display power-management readout. |
| Ugreen | Nexode 145W Power Bank for Laptop (25,000mAh) | 25000 mAh | 92.5 Wh | 145 W | 2x USB-C, 1x USB-A | PD 3.1 / QC 3.0 | — | $149.99 | ✓ | — |
| INIU | B62 100W 25,000mAh High-Performance Battery Bank | 25000 mAh | 92.5 Wh | 100 W | USB-C, USB-A, LED display + phone holder | PD 3.0 | — | — | ✓ | — |
| Anker | 737 Power Bank (PowerCore 24K) — A1289 | 24000 mAh | 86.4 Wh | 140 W | 2x USB-C, 1x USB-A | PD 3.1 | 630 g | $109.99 | ✓ | — |
| Ugreen | Nexode 20,000mAh 165W Power Bank with retractable cable — PB726 | 20000 mAh | 74 Wh | 165 W | 1x built-in retractable USB-C, 1x USB-C | PD 3.0 | — | — | ✓ | ChargerLAB teardown (chargerlab.com/teardown-of-ugreen-nexode-20000mah-165w-power-bank...-pb726): confirms SunPower 21700 cells rated to retain >70% capacity after 1,000 cycles; each port independently supports up to 100W, dropping to 100W+65W when used together. |
| Ugreen | Nexode 20,000mAh 130W Power Bank with built-in cable — PB723 | 20000 mAh | 74 Wh | 130 W | 1x built-in USB-C, 1x USB-C, 1x USB-A | PD 3.0 | — | — | ✓ | ChargerLAB teardown (chargerlab.com/teardown-of-ugreen-nexode-20000mah-130w-power-bank...-pb723): confirms 100W+30W dual output split and 80W max recharge input (~2h full recharge). |
| Baseus | Blade Laptop Power Bank 100W 20,000mAh | 20000 mAh | 74 Wh | 100 W | 2x USB-C (100W max), 2x USB-A (30W max) | PD 3.0 / QC 4+ / SCP / FCP / AFC | 490 g | — | ✓ | — |
| INIU | P62-E1 Power Bank 20,000mAh 65W | 20000 mAh | 74 Wh | 65 W | 2x USB-C, 1x USB-A | PD 3.0 | — | — | ✓ | — |
| Belkin | BoostCharge Pro 3-Port Laptop Power Bank 20K | 20000 mAh | 74 Wh | 65 W | 1x USB-C (65W), 1x USB-C, 1x USB-A | PD | — | — | ✓ | — |
| Mophie | Powerstation Pro 20K | 20000 mAh | 74 Wh | 30 W | 3x USB-C PD (30W each) | USB-C PD | — | — | ✓ | — |
| Samsung | 25W Battery Pack 20,000mAh — EB-P5300 | 20000 mAh | 74 Wh | 25 W | 2x USB-C (in/out), 1x USB-A (out) | PD 3.0 / AFC / QC 2.0 | — | — | ✓ | — |