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ALLWEI 300W Portable Power Station
Cheapest LiFePO4PortableUnder $300

ALLWEI

ALLWEI 300W Portable Power Station

The cheapest LiFePO4 power station worth buying.

4.4 (2,450)4.5/10
Capacity
256 Wh
Output
300 W
Surge
600 W
Weight
6.4 lb
Recharge
3.8 h
Solar in
—
$128.99$179.00−28%Amazon price as of Sep 27, 2026

In stock · 1K+ bought last month · Sold by Aullsumy (ships from Amazon)

Check price on Amazon

Our verdict

The best cheap power station: slow to charge, but long-lived and honest.

256 Wh of long-life LiFePO4 and a 300 W pure-sine outlet for about $130 — enough for a CPAP without heat for two to three nights, a router through an outage or phones and lights on a camping trip.

Ideal for

A first backup for a router, CPAP (no heat) or phones, on a tight budget.

Skip it if

Anyone who needs to recharge quickly or run more than 300 W.

Capacity3Output2Charging2Solar inputn/aPortability9Battery life6Value8

Editor scores

How it rates

  • Capacity3
  • Output2
  • Charging2
  • Solar inputn/a
  • Portability9
  • Battery life6
  • Value8

Scores are our editorial ratings (0–10), not manufacturer specs. How we score.

Specifications

Full spec sheet

Battery

Capacity256 Wh
Battery chemistryLiFePO4
Rated cycles3,000 cycles
Expandable to—

Output

AC output (continuous)300 W
Surge / peak600 W
AC outlets1
Fastest USB-C port60 W
30 A RV outlet—

Charging

Max AC charging input—
Full charge from the wall225 min
Charging speed (claimed)3.5–4 h from the wall
Max solar input—
UPS switchover—

Size & build

Weight6.4 lb
Dimensions9.25 × 5 × 6.8 in
Noise (claimed)—

Other

App control—
Warranty2 years

Other details

Outputs1 AC (pure sine), 2 DC5521, car socket, USB-A 18 W, USB-C 60 W
Solar4–5 h with a 100 W panel (max input not listed)
Light3-level LED with SOS

How long it runs (estimates)

CPAP, no humidifier (40 W, 8 h a night)0.7 nights
CPAP + heated humidifier (90 W)0.3 nights
Wi-Fi router + modem (20 W)11 h
Full-size fridge (~1.3 kWh a day)Can't start a typical fridge (needs ~1,200 W surge)
Laptop (60 W)3.6 h
Phone charges (~15 Wh each)15 charges

Based on 256 Wh × 85% usable after inverter losses. Your devices may draw more or less — check yours in the calculator.

Will it run your devices?Check ALLWEI 300W Portable Power Station against your fridge, CPAP, router and anything else in the runtime calculator

Sources: Amazon listing (256 Wh LiFePO4, 3,000 cycles, 300 W / 600 W surge, 6.4 lb, 2-year warranty). A dash (—) means the value isn't published anywhere we could verify.

In-depth review

What it's like to own

ALLWEI's 300 W unit is as simple as power stations get: one AC outlet, a 60 W USB-C port, DC barrel jacks and a car socket, wrapped around a 256 Wh LiFePO4 battery rated for 3,000 cycles.

The trade-off for the price is charging speed: 3.5 to 4 hours from the wall and 4 to 5 hours from a 100 W panel. There's no app and no UPS mode.

Owners report running a CPAP without heat for about 20 hours over three nights, and one mountain owner bought three to ride out wind-related shutoffs. A few note the battery gauge can drop suddenly near empty.

Pros

  • About $130 for LiFePO4
  • Pure sine wave AC
  • 60 W USB-C
  • 2-year warranty

Cons

  • Slow 3.5–4 h recharge
  • Only one AC outlet
  • No UPS or app
  • Max solar input not published
See it on Amazon

Owner reviews

What buyers say

4.4 (2,450)
  • 5★73%
  • 4★12%
  • 3★5%
  • 2★2%
  • 1★8%

4.4★ from 2,450 ratings (85% 4–5 stars). Owners praise build quality, quiet operation and real-world CPAP runtime. One 4-star owner saw the battery gauge fall from 99% to low suddenly.

5.0Aug 20, 2026

Ran a CPAP without heat for 20 hours over three nights.

— Emanym Ton, Amazon.com

5.0May 27, 2026

Bought three for wind-related power shutoffs in the mountains.

— HikerBiker, Amazon.com

5.0Aug 3, 2026

Works as well as a pricier brand, quiet and long-lasting.

— Charisse Vaunado, Amazon.com

4.0Oct 11, 2025

Well built, but the gauge dropped suddenly after hours at 99%.

— Dani Burke, Amazon.com

Owner reviews from Amazon.com, summarized in our words. Ratings as of Sep 27, 2026.

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