MARBERO M823
#25 in SmallFull review
A very light, low-cost 237Wh station for charging phones, cameras and a CPAP on short trips. Buyers who need longer battery life or laptop-speed USB-C should look at LiFePO4 models.
Amazon $143.99$143.99
The MARBERO M823 is the better portable power station overall, rated 3.3 to 2.7. The MARBERO M823 leads on value and AC output. The Duracell M250 wins on charging speed and features. The MARBERO M823 costs $105.01 less ($143.99 vs $249).
Duracell M250
#29 in SmallFull review
For people who want a tidy desk or bedside battery for phones and laptops, with wireless charging and a small AC outlet. Anyone who needs to run appliances should buy a conventional power station.
Amazon $249$249
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the MARBERO M823 for value ($0.61 per rated Wh vs $1.14 per rated Wh) and AC output (300 W continuous AC vs 100 W continuous AC).
- Choose the Duracell M250 for charging speed (0-100% on AC in 3 h 30 min vs 0-100% on AC in 6 h) and features (100 W USB-C vs no UPS, expansion or app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every small portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | MARBERO M823 | Duracell M250 |
|---|---|---|
| Overall rating | 3.3/5 | 2.7/5 |
| Value 25% | 86 $0.61 per rated Wh | 40 $1.14 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 15 Lithium-ion, 1-year warranty | 15 Li-ion NMC, 500 cycles, 2-year warranty |
| AC output 15% | 41 300 W continuous AC | 0 100 W continuous AC |
| Charging speed 10% | 0 0-100% on AC in 6 h | 16 0-100% on AC in 3 h 30 min |
| Portability 10% | 100 114 Wh per kg (4.6 lb (2.1 kg)) | 100 107 Wh per kg (4.5 lb (2 kg)) |
| Solar input 5% | 50 solar input not published (neutral score used) | 50 solar input not published (neutral score used) |
| Features 5% | 0 no UPS, expansion or app | 20 100 W USB-C |
Specifications
| MARBERO M823 | Duracell M250 | |
|---|---|---|
| Battery | ||
| Rated capacity | 237 Wh | 219 Wh |
| Chemistry | Lithium-ion | Li-ion NMC |
| Cycle life | - | 500 to 80% |
| Expandable | - | No |
| Output | ||
| AC output | 300 W (375 W surge) | 100 W |
| AC outlets | 2 total | 1 total |
| 120V 15A outlets (NEMA 5-15R) | 1 | - |
| 120V 2-prong outlets (NEMA 1-15R) | 1 | 1 |
| AC waveform | Pure sine wave | Modified sine wave |
| USB-C ports | 1 (18 W) | 2 (up to 100 W each) |
| USB-A ports | 4 | 2 |
| 12 V car outlet | No | No |
| DC5521 ports | - | 0 |
| UPS / pass-through | - | No |
| Charging | ||
| Full AC charge time | 6 h ("Fully quick charged in 6hrs" from the wall per the listing; 8 hr from a 12V car socket) | 3 h 30 min (About 3.5 h from a USB-C wall charger, about 5.5 h on the included 60W charging dock (manufacturer); Amazon listing says 3 h by USB-C) |
| Solar input voltage | 16.4-24V | - |
| Build | ||
| Weight | 4.6 lb (2.1 kg) | 4.5 lb (2 kg) |
| Dimensions | 8.15 x 5.83 x 3.90 in | 5.0 in diameter x 10.4 in tall |
| App | - | - |
| Warranty | 1 years | 2 years |