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Arkpax · portable power station
Arkpax C300-US
Small class (under 500 Wh). #136 of 218 portable power stations on Benchwatt by popularity on Amazon US.
Capacity
192 Wh
Output
300 W
Weight
9.1 lb
Wh per lb
21
Price and availability are on Amazon; we don't show or track prices.
Published specs
| Brand | Arkpax |
|---|---|
| Model | C300-US |
| Battery capacity | 192 Wh |
| Rated AC output (continuous) | 300 W |
| Surge / peak output | 600 W |
| Battery chemistry | LiFePO4 |
| Weight | 9.1 lb |
| UPS / switchover (per the listing) | Yes |
| Amazon ASIN | B0GJBLLRDW |
| Specs checked | November 11, 2026 |
From the maker's listing. Specs not stated there are left out rather than guessed.
Our math
21 Wh per pound (192 Wh ÷ 9.1 lb). That is #184 of 184 portable power stations on Benchwatt with a listed weight. Higher means more stored energy for each pound you carry.
At its full rated 300 W, a full charge lasts about 33 min.
Runtime estimates
Hours = 192 Wh × 0.85 ÷ device watts. Typical draws; check your own device's label.
| Device | Draw | Runtime |
|---|---|---|
| Phone charging | 10 W | 16 h |
| Laptop | 60 W | 2.7 h |
| CPAP (no humidifier) | 40 W | 4.1 h |
| Mini fridge (average draw) | 60 W | 2.7 h |
| Full-size fridge (700 kWh/yr label) | 80 W | 2 h |
| TV | 100 W | 1.6 h |
| Space heater | 1,500 W | Exceeds rated output |
Estimates, not measurements. Fridges cycle on and off, so their average draw is well under their rated watts; heaters and kettles run near full power.
Similar capacity
Other portable power stations within ±35% of 192 Wh, most popular first.
| Model | Capacity | Output | Cells | Weight | Wh/lb | Amazon link |
|---|---|---|---|---|---|---|
| Arkpax C300-US | 192 Wh | 300 W | LiFePO4 | 9.1 lb | 21 | Check price on Amazon |
| MARBERO M823SL60 | 237 Wh | 300 W | Li-ion | 9 lb | 26 | Check price on Amazon |
| MARBERO M823 | 237 Wh | 300 W | — | 4.6 lb | 52 | Check price on Amazon |
| ALLWEI 256Wh | 256 Wh | 300 W | LiFePO4 | 6.4 lb | 40 | Check price on Amazon |
| Yewpiny 300w | 259 Wh | 300 W | LiFePO4 | 7.2 lb | 36 | Check price on Amazon |
| FF Flashfish E200 | 151 Wh | 200 W | — | 4.1 lb | 37 | Check price on Amazon |
| GRECELL EB300 (231 Wh) | 231 Wh | 330 W | — | 7.3 lb | 32 | Check price on Amazon |
Arkpax C300-US
192 Wh / 300 W · LiFePO4. See the current price and seller on Amazon.