Dabbsson 300E
#17 in SmallFull review
For campers and travelers who want a light LiFePO4 battery for phones, laptops, lights and a CPAP. Its 300W ceiling and slow wall charging rule out appliances.
Amazon $199 Dabbsson $199$199
The Dabbsson 300E is the better portable power station overall, rated 3.5 to 3.4. The Dabbsson 300E leads on battery life and features. The EnginStar R300 wins on portability and value. The EnginStar R300 costs $49.01 less ($149.99 vs $199).
EnginStar R300
#22 in SmallFull review
A cheap, light 296Wh station for phones, cameras, CPAP and small camping loads. Buyers who will cycle it often should pay a little more for a LiFePO4 model with a longer warranty.
Amazon $149.99$149.99
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 Dabbsson 300E for battery life (Semi-solid-state LiFePO4, 4,000 cycles, 5-year warranty vs Lithium-ion, 1,000 cycles, 1-year warranty) and features (app vs no UPS, expansion or app).
- Choose the EnginStar R300 for portability (100 Wh per kg (6.5 lb (3 kg)) vs 70 Wh per kg (9.4 lb (4.3 kg))) and value ($0.51 per rated Wh vs $0.67 per rated Wh).
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 | Dabbsson 300E | EnginStar R300 |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Value 25% | 81 $0.67 per rated Wh | 95 $0.51 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% | 100 Semi-solid-state LiFePO4, 4,000 cycles, 5-year warranty | 19 Lithium-ion, 1,000 cycles, 1-year warranty |
| AC output 15% | 41 300 W continuous AC | 41 300 W continuous AC |
| Charging speed 10% | 6 0-100% on AC in 3 h 48 min | 0 0-100% on AC in 7 h |
| Portability 10% | 45 70 Wh per kg (9.4 lb (4.3 kg)) | 100 100 Wh per kg (6.5 lb (3 kg)) |
| Solar input 5% | 30 120 W max solar input | 50 solar input not published (neutral score used) |
| Features 5% | 20 app | 0 no UPS, expansion or app |
Specifications
| Dabbsson 300E | EnginStar R300 | |
|---|---|---|
| Battery | ||
| Rated capacity | 298 Wh | 296 Wh |
| Chemistry | Semi-solid-state LiFePO4 | Lithium-ion |
| Cycle life | 4,000 to 80% | 1,000 >1000 cycles per the manual; end-of-life capacity not stated |
| Expandable | No | - |
| Output | ||
| AC output | 300 W (600 W surge) | 300 W |
| AC outlets | 2 total | 2 total |
| 120V 15A outlets (NEMA 5-15R) | 1 | 2 |
| 120V 2-prong outlets (NEMA 1-15R) | 1 | - |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 1 (60 W) | 1 (18 W) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 1 | 2 |
| Charging | ||
| AC charging | 100 W | 65 W |
| Full AC charge time | 3 h 48 min | 7 h (About 7 hours per the manual and the B09SHB84J2 listing; a listing image says 5-7 hr. Another EnginStar listing (B0FJD7LCY4) claims 80% in 2 hours, which doesn't fit a 65W input and isn't used here.) |
| Max solar input | 120 W | - |
| Solar input voltage | 12-30V, 6A max (AC + solar combined up to 220W) | 12-25V |
| Car charging | 120 W | - |
| Build | ||
| Weight | 9.4 lb (4.3 kg) | 6.5 lb (3 kg) |
| Dimensions | 11.7 x 7.2 x 7 in | 9.06 x 7.64 x 5.51 in |
| App | Dabbsson app | - |
| Warranty | 5 years | 1 years |