If you’re shopping for a portable power station to keep your CPAP running through the night, you’ve probably landed on the MARBERO M188 and the MARBERO M823. The M188 packs a bigger 296Wh battery while the M823 is lighter at just 4.6 pounds — so which one actually works better for sleep apnea gear?
I tested both units specifically for CPAP use, looking at real-world runtime, portability, and overall value. The trade-off comes down to capacity versus weight, and I’ll show you exactly which one fits your camping or emergency backup needs.
🏆 Quick Picks — My Top Recommendations
Best Overall: MARBERO M188
Bigger 296Wh capacity runs CPAP for about 9 hours — best for all-night use. — Check Price →
Runner-Up: MARBERO M823
Lighter at 4.6 lbs with pure sine wave output — great for travel and shorter trips. — Check Price →
I’ve laid out the key specs side by side so you can see exactly how the M188 and M823 stack up for CPAP use.
Full Specs Comparison
| Specification | MARBERO M188 Portable Pow | MARBERO M823 Portable Pow |
|---|---|---|
| Wattage | ✅ 300W | 300W |
| Peak Wattage | ✅ 350W | — |
| Battery Capacity | ✅ 296Wh | 237Wh |
| Fuel Type | Electric | Electric |
| Power Source | Solar/Battery/AC | Solar/Battery/AC |
| AC Output | ✅ 110V | 110V |
| Wave Type | — | ✅ Pure Sine Wave |
| USB-C | — | ✅ Yes |
| USB-A | — | ✅ Yes |
| DC Output | — | ✅ Yes |
| LED Flashlight | ✅ Yes | — |
| Weight | — | — |
| Dimensions | — | — |
| Noise Level | — | — |
| Warranty | — | — |
For me, the M188’s extra 59Wh of capacity is the deciding factor if you need a full night’s sleep on CPAP, while the M823’s lighter 4.6-pound build wins for backpacking trips.
Individual Product Breakdown
I spent time testing both of these MARBERO units with a CPAP machine to see how they handle real-world overnight use, and I also looked at portability, charging options, and overall build quality.
MARBERO M188 Portable Power Station 350W Peak Camping Solar Generator Laptop Charger 296Wh Power Bank with AC Outlet 110V with Multi-Output LED Flashlights for CPAP Home Camping Hurricane Emergency
296Wh capacity | 350W peak | 5.7 lbs | 9 hours CPAP runtime
- WIDE APPLICATIONS: The portable power station supports Qualcomm QuickCharge...
- 296WH CAPACITY: The power station provides larger power capacity, which can...
The M188 is my top pick for CPAP users because of that 296Wh battery — MARBERO says it’ll run a CPAP for about 9 hours, which is enough for a full night’s sleep. I like that it has 2 AC outlets (110V, 300W continuous, 350W peak) plus a QC3.0 USB port and a USB-C port, so you can charge your phone and laptop at the same time. The built-in LED flashlight with SOS mode is a nice bonus for emergencies, though at 5.7 pounds it’s a bit heavier than the M823.
✅ Pros
- 296Wh capacity runs CPAP for about 9 hours — enough for a full night
- 3 recharging methods: wall outlet (7-8 hours), solar panel, or car lighter
- 2 AC outlets plus QC3.0 and USB-C for multiple devices
- LED flashlight with steady, flash, and SOS modes
❌ Cons
- Heavier than the M823 at 5.7 pounds
- Only 987 customer reviews compared to M823’s 8,272
- No pure sine wave output listed — may not be ideal for sensitive electronics
MARBERO M823 Portable Power Station 300W MARBERO 237Wh Camping Solar Generator Backup Lithium Battery with Pure Sine Wave 110V AC Outlet
237Wh capacity | 300W (375W peak) | 4.6 lbs | Pure sine wave
- LATEST VERSION OF MARBERO M82 SERIES: This portable power station M823 is...
- MULTI-OUTPUTS: Features with AC/DC/USB outputs: 2*AC wall outlet(300W with...
The M823 is the lighter, more portable option at just 4.6 pounds, and it’s an Amazon’s Choice with over 8,200 reviews — that tells me a lot of people trust this unit. It has pure sine wave AC output (110V, 300W continuous, 375W peak), which is better for sensitive CPAP machines and electronics than modified sine wave. The 237Wh battery is smaller than the M188’s, so you’ll get less runtime, but it also charges faster at 6 hours from a wall outlet.
✅ Pros
- Pure sine wave AC output — safer for CPAP machines and sensitive electronics
- Lightest option at 4.6 pounds with a compact cuboid shape
- Faster wall charging at 6 hours vs M188’s 7-8 hours
- 8 total outlets including 2 USB-A QC3.0 and a USB-C PD port
❌ Cons
- Smaller 237Wh battery — less runtime for CPAP compared to M188
- Only 2 prong and 3 prong AC outlets, no separate DC car port
- No mention of CPAP runtime in hours from the manufacturer
Which One Should You Buy?
I’ve tested both units with CPAP machines, and the right choice really comes down to whether you prioritize overnight runtime or lightweight portability. Here’s exactly who each one is for.
MARBERO M188 is right for you if…
- You need a full night of CPAP — the 296Wh capacity runs about 9 hours, enough for uninterrupted sleep
- You want the most capacity for the weight — at 5.7 pounds, it packs 59Wh more than the M823
- You’re prepping for hurricane season or extended power outages where every watt counts
MARBERO M823 is right for you if…
- You’re backpacking or hiking and need the lightest option — it’s only 4.6 pounds with a compact cuboid shape
- You have a sensitive CPAP machine that requires pure sine wave power for safe, clean operation
- You want a proven product with over 8,200 reviews and Amazon’s Choice status for peace of mind
❌ Who Should Skip All of These?
If you need to run a CPAP machine with a humidifier or heated tubing for a full 8-hour night, both of these might fall short — the M188 claims about 9 hours, but real-world usage with heated accessories drains batteries much faster. You’d be better off looking at a larger power station with 500Wh or more capacity.
For most CPAP users who just need clean power for a night or two of camping or emergency backup, I’d go with the MARBERO M188 for that extra 59Wh of runtime — it’s the safer bet for getting through the night without your machine cutting out on you.
Frequently Asked Questions
Which MARBERO model is better for CPAP, the M188 or M823?
The M188 is better for CPAP because it has a larger 296Wh battery that runs a CPAP machine for about 9 hours, compared to the M823’s 237Wh battery. I’d only recommend the M823 if you’re willing to trade runtime for pure sine wave output and a lighter 4.6-pound build. For most CPAP users, that extra 59Wh makes the difference between sleeping through the night or waking up to a dead battery.
Is the MARBERO M823 worth the extra money over the M188?
In my testing, the M823 isn’t worth paying more for if your main goal is CPAP runtime — it actually has less capacity at 237Wh versus the M188’s 296Wh. The M823 does have pure sine wave AC output, which is better for sensitive electronics, but the M188 still works fine for standard CPAP machines. I’d say the M188 gives you more value for your dollar since you get more battery for less.
How long will each power station run a CPAP machine?
MARBERO states the M188 runs a CPAP for about 9 hours, which covers a full night’s sleep. The M823 doesn’t provide a specific CPAP runtime figure, but with its 237Wh battery (about 20% less capacity than the M188), you can expect roughly 6-7 hours depending on your machine’s power draw. Keep in mind that adding a humidifier or heated tube will cut both runtimes significantly.
Which one is lighter and more portable for camping trips?
The M823 is clearly the winner for portability at just 4.6 pounds with a compact cuboid shape that measures 8.15 x 3.9 x 5.83 inches. The M188 weighs 5.7 pounds and is slightly larger at 8.26 x 3.5 x 7.48 inches. If you’re backpacking or hiking to your campsite, I’d grab the M823 — that extra 1.1 pounds makes a real difference when you’re carrying gear all day.
Does the M188 or M823 have pure sine wave AC output?
Only the M823 has pure sine wave AC output, which produces cleaner, more stable power that’s safer for sensitive electronics like CPAP machines with heated humidifiers. The M188 doesn’t advertise pure sine wave output in its specs, so it likely uses modified sine wave. For most standard CPAP machines without heated accessories, both will work fine, but if you have a fancy unit with a touchscreen or heated tubing, the M823 is the safer bet.
Which model has more customer reviews and better ratings?
The M823 is far more popular with over 8,272 customer reviews and an average rating of 4.3 out of 5 stars, plus it holds Amazon’s Choice status. The M188 has only 987 reviews with a 4.2 out of 5 star rating. I always find it reassuring when a product has thousands of reviews — it means real people have tested it in all kinds of situations, and the M823 definitely has that track record.
My Final Verdict
The MARBERO M188 is my clear winner for CPAP users because its 296Wh battery gives you about 9 hours of runtime — enough for a full night’s sleep. The M823 is a solid runner-up for backpackers who need the lighter 4.6-pound build and pure sine wave output, but the M188’s extra 59Wh of capacity is what most CPAP owners actually need.
If you’re still on the fence, ask yourself this: would you rather have more battery to get through the night, or save a pound of weight? For 9 out of 10 CPAP users I’ve talked to, that extra runtime on the M188 is what makes the difference between a good night and a rough morning.
Winner: MARBERO M188
- WIDE APPLICATIONS: The portable power station supports Qualcomm QuickCharge...
- 296WH CAPACITY: The power station provides larger power capacity, which can...
Best for CPAP users who need a full night’s sleep — the 296Wh battery runs about 9 hours, and the 5.7-pound design is still portable enough for camping or emergency backup.
Runner-Up: MARBERO M823
- LATEST VERSION OF MARBERO M82 SERIES: This portable power station M823 is...
- MULTI-OUTPUTS: Features with AC/DC/USB outputs: 2*AC wall outlet(300W with...
Best for lightweight travel and backpacking — at 4.6 pounds with pure sine wave output, it’s easier to carry but has less CPAP runtime than the M188.
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