How long do portable power stations last?

Two answers. Per charge: hours = capacity (Wh) × 0.85 ÷ device watts, so the median model here (1,024 Wh) runs a 60 W laptop for about 15 hours. Over its life: makers rate the battery in charge cycles before capacity drops to a stated level. LiFePO4 cells are generally rated for more cycles than other lithium-ion chemistries, and 177 of the 218 power stations we list use LiFePO4. Check each maker's cycle-life spec and warranty; we haven't measured either.

What is a portable power station?

A portable power station is a rechargeable battery with a built-in inverter, so it has regular AC outlets as well as USB and 12V ports. You charge it from a wall outlet, a car socket or solar panels, then run devices from it without fuel, fumes or engine noise. The power stations on Benchwatt store from 150 Wh to 10,017 Wh.

Portable Power Station for CPAP: The Watt Math

How we picked: published specs + popularity on Amazon US, and the watt math below. We don't run hands-on tests, and this is not medical advice: ask your doctor or equipment supplier before changing how you power your therapy. Our method

Your CPAP, your numbers

CPAP draw (watts)Hours per night

Capacity per night

377 Wh

The smallest power station in our list that covers one night at these settings is FF Flashfish 400Wh (400 Wh).

Nights per charge, most popular models

At 40 W for 8 hours a night. The ten most popular power stations in our catalog.

Model	Capacity	Output	Cells	Weight	Wh/lb	Nights per charge	Amazon link
Jackery Explorer 300	292 Wh	300 W	LiFePO4	7.1 lb	41	0.8	Check price on Amazon
Jackery Explorer 1000 V2 (1,024 Wh)	1,024 Wh	1,500 W	LiFePO4	23.4 lb	44	2.7	Check price on Amazon
Anker SOLIX C300 DC	288 Wh	300 W	LiFePO4	6.2 lb	46	0.8	Check price on Amazon
Bluetti Elite 30 V2	288 Wh	600 W	LiFePO4	9.5 lb	30	0.8	Check price on Amazon
MARBERO M823SL60	237 Wh	300 W	Li-ion	9 lb	26	0.6	Check price on Amazon
Bluetti AC180	1,152 Wh	1,800 W	LiFePO4	37.4 lb	31	3.1	Check price on Amazon
MARBERO M823	237 Wh	300 W	—	4.6 lb	52	0.6	Check price on Amazon
Anker SOLIX C1000 Gen 2 (1,024 Wh)	1,024 Wh	2,000 W	LiFePO4	24.9 lb	41	2.7	Check price on Amazon
EcoFlow Delta 3 Classic	1,024 Wh	1,800 W	LiFePO4	26.7 lb	38	2.7	Check price on Amazon
EcoFlow Delta 3 (1,024 Wh)	1,024 Wh	1,800 W	LiFePO4	27.5 lb	37	2.7	Check price on Amazon

How much the draw changes the answer

Same math at three example draws (30 W, 60 W, 90 W) for 8 hours. These are round numbers to show the effect, not figures for any particular machine.

Model	Capacity	Output	Cells	Weight	Wh/lb	30 W	60 W	90 W
Jackery Explorer 300	292 Wh	300 W	LiFePO4	7.1 lb	41	1.0 nights	0.5 nights	0.3 nights
Jackery Explorer 1000 V2 (1,024 Wh)	1,024 Wh	1,500 W	LiFePO4	23.4 lb	44	3.6 nights	1.8 nights	1.2 nights
Anker SOLIX C300 DC	288 Wh	300 W	LiFePO4	6.2 lb	46	1.0 nights	0.5 nights	0.3 nights
Bluetti Elite 30 V2	288 Wh	600 W	LiFePO4	9.5 lb	30	1.0 nights	0.5 nights	0.3 nights
MARBERO M823SL60	237 Wh	300 W	Li-ion	9 lb	26	0.8 nights	0.4 nights	0.3 nights
Bluetti AC180	1,152 Wh	1,800 W	LiFePO4	37.4 lb	31	4.1 nights	2.0 nights	1.4 nights

Things that change the math

Humidifier and heated tube. Heating water and air can raise consumption a lot compared with the blower alone. Check the draw your manual lists with them on. Whether to change those settings is a question for your doctor, not for us.
DC vs AC. Some CPAP makers sell a DC cord or converter. Running from the station's DC outlet skips the inverter, so our 85% factor is conservative in that case. Use only the maker's approved accessories.
Pressure settings. Higher pressure generally means higher draw. Your machine's documentation is the source for your settings.
Battery reserve. Many stations stop before 0% to protect the cells, and capacity drops in the cold. Leave headroom of a night or more.

For other devices, use the size calculator; for the lightest options to take camping, see camping picks.

Portable power station for CPAP