How we selected these picks
Every battery on this list meets three criteria. First, it is currently available on Amazon with Prime shipping. Second, it delivers a pure sine wave or DC output clean enough to run a CPAP machine without tripping its internal protections. Third, it has at least 100 verified customer reviews with a 4-star average or higher.
We did not simply sort by star rating. We weighted each pick against real-world CPAP power demands. A typical CPAP machine draws 10 to 15 watts on a pressure-only setting and 30 to 50 watts with a heated humidifier and heated tube running. Those numbers matter because they determine how many hours you actually get from a given watt-hour capacity. A 100Wh battery sounds impressive until you realize it runs a humidifier-equipped CPAP for roughly two to three hours — barely enough for a full night.
We also checked inverter efficiency. Portable power stations lose 10 to 15 percent of their stored energy converting DC to AC. That means a 256Wh battery delivers closer to 215 to 230Wh of usable power at the wall outlet. If your CPAP supports a DC power adapter, you skip that conversion loss entirely and gain 15 to 20 percent more runtime. Our CPAP DC power adapter guide covers which machines support direct DC connections and which adapters to use.
With those ground rules set, here are nine picks organized by price.
Budget picks under $200
These batteries work best for travel, short power outages, or CPAP users who run their machines without humidification. If you typically sleep with the humidifier off and your pressure sits at 8 to 12 cmH2O, a budget battery can get you through a full night.
Jackery Explorer 100 Plus — $99, 99Wh
The Explorer 100 Plus is the cheapest entry point that still delivers reliable CPAP power. At 99Wh and 128 watts of continuous output, it handles any CPAP on pressure-only mode without issue.
Estimated runtime: 6 to 9 hours without humidifier (at 10 to 15W draw). With humidifier, expect 2 to 3 hours — not enough for a full night.
Pros:
- Lightest option on this list at 2.2 pounds
- USB-C passthrough charging means you can recharge it while using it if you have shore power
- LiFePO4 cells rated for 2,000 charge cycles
- Small enough to fit in a CPAP travel bag
Cons:
- Only one AC outlet, maxing out at 128W
- Not viable for humidifier users unless paired with a second unit
- No built-in display showing remaining watt-hours
Best for: Weekend trips, airline-friendly backup (under the FAA's 100Wh carry-on limit), or as a nightstand emergency battery for short outages.
Anker SOLIX C300 DC — $149, 90Wh
Anker's C300 DC is technically a general-purpose portable charger, but its 12V DC barrel connector and 90Wh LiFePO4 battery make it a surprisingly good CPAP companion — if you use a DC adapter cable. Running your CPAP directly off DC eliminates inverter losses entirely.
Estimated runtime: 6 to 8 hours without humidifier via DC. On AC, expect 5 to 6 hours due to conversion losses.
Pros:
- 12V DC output lets you bypass the inverter for maximum efficiency
- 3,000-cycle LiFePO4 chemistry
- Compact form factor with a built-in flashlight
- Anker's 5-year warranty
Cons:
- 90Wh is the smallest capacity in this roundup
- Requires purchasing a separate DC adapter cable for your specific CPAP
- AC output is limited to 90W, which may not support some heated humidifiers at full settings
Best for: CPAP users who already own or are willing to buy a DC adapter and want maximum efficiency from a small battery.
Jackery Explorer 240 v2 — $179, 256Wh
This is the budget pick we recommend most often. At 256Wh, the Explorer 240 v2 crosses the threshold where humidifier use becomes practical for a full night of sleep.
Estimated runtime: 5 to 8 hours with humidifier (at 30 to 50W). Without humidifier, 15 to 20 hours — easily two full nights.
Pros:
- 256Wh is enough for one full night with humidification at moderate settings
- 300W continuous AC output handles any CPAP on the market
- LiFePO4 battery with 2,000-cycle lifespan
- Under $200, which is a practical barrier for many buyers
Cons:
- Heavier than the two options above at 5.3 pounds
- Fan noise is audible in a quiet bedroom, though most users report it is quieter than the CPAP itself
- No wireless charging pad or USB-C PD output on earlier production runs
Best for: The best all-around budget option. If you use a humidifier and want one full night of backup power for under $200, this is the battery to buy. For a deeper comparison, see our Jackery vs EcoFlow for CPAP breakdown.
Mid-range options $200–350
This tier is where most CPAP users land. Batteries in this range reliably deliver one to two full nights of humidified CPAP therapy and include features like app connectivity, faster charging, and multiple output ports.
EcoFlow RIVER 2 — $249, 256Wh
The RIVER 2 matches the Jackery 240 v2 on capacity but adds EcoFlow's faster charging technology. It charges from zero to 100 percent in about 60 minutes using its AC wall charger, which is genuinely useful if you find out about an incoming storm with short notice.
Estimated runtime: 5 to 8 hours with humidifier. 15 to 20 hours without.
Pros:
- 60-minute full charge via AC wall charging
- EcoFlow app lets you monitor remaining capacity from your phone
- X-Boost mode can handle surge loads up to 450W
- LiFePO4 chemistry, 3,000-cycle rating
Cons:
- Fan runs more aggressively during fast charging and can be loud
- Slightly heavier than the Jackery 240 v2 at 7.7 pounds
- X-Boost mode uses additional energy, reducing effective runtime
Best for: Users who want fast recharge capability and do not mind a slightly heavier unit.
Bluetti EB3A — $269, 268Wh
The EB3A packs 268Wh into a compact frame and includes a built-in wireless charging pad on top of the unit. It supports 200W solar input if you ever want to pair it with a panel for extended off-grid use.
Estimated runtime: 5 to 8 hours with humidifier. 16 to 22 hours without.
Pros:
- 268Wh capacity at a competitive price
- 600W inverter with ability to handle brief surges to 1,200W
- Built-in wireless phone charging pad
- Supports both AC and solar recharging simultaneously
Cons:
- The fan can cycle on and off during light CPAP loads, which some users find distracting
- At 7.3 pounds, it is not the most portable option for air travel
- Bluetti's app has received mixed reviews for connectivity reliability
Best for: Users who want the most features per dollar, especially if solar charging interests you for camping or extended outages.
Jackery Explorer 300 Plus — $279, 288Wh
The 300 Plus sits at the top of the mid-range tier and delivers the highest capacity in this bracket. At 288Wh, it offers a comfortable margin for a full night of humidified CPAP use, even at higher pressure settings.
Estimated runtime: 6 to 9 hours with humidifier. 17 to 24 hours without.
Pros:
- 288Wh gives the most capacity in this price bracket
- 300W pure sine wave output
- LiFePO4 with 2,000-cycle rating
- Compatible with Jackery's solar panel ecosystem
Cons:
- Charging is slower than the EcoFlow RIVER 2 at roughly 2 hours from empty
- No app connectivity
- Price sits close to the EcoFlow RIVER 2 Max on sale days
Best for: Anyone who wants the most watt-hours under $300. Check our CPAP battery sizing guide to calculate whether 288Wh is enough for your specific machine and settings.
Premium batteries over $350
These batteries either specialize in CPAP use or deliver multi-night capacity that makes them practical for extended power outages, off-grid living, or week-long camping trips.
Medistrom Pilot-24 Lite — $399, 97Wh
The Pilot-24 Lite is the only battery on this list designed specifically for CPAP machines. It connects to compatible ResMed and Philips devices via a proprietary DC cable, delivering power directly to the machine with zero inverter loss.
Estimated runtime: 8 to 10 hours without humidifier via DC connection. Not recommended for humidifier use due to limited capacity.
Pros:
- Purpose-built for CPAP — plug-and-play with supported ResMed and Philips models
- FAA-approved for air travel at 97Wh
- Dead silent with no fan
- Automatic failover: plugs between the CPAP and wall outlet, then seamlessly switches to battery during an outage
Cons:
- 97Wh is small for the price; general-purpose batteries offer far more capacity per dollar
- Only works with supported CPAP models via proprietary cables
- Humidifier use cuts runtime to 2 to 3 hours
- At $399, it costs four times what the Jackery Explorer 100 Plus costs for nearly identical capacity
Best for: Frequent flyers with a compatible ResMed or Philips machine who value zero-configuration simplicity and FAA compliance. See our best battery for ResMed AirSense 11 guide if this is your machine.
EcoFlow RIVER 2 Max — $449, 512Wh
The RIVER 2 Max doubles the capacity of the standard RIVER 2 and enters the territory of genuine multi-night CPAP backup. At 512Wh, it can run a humidified CPAP for two full nights on a single charge.
Estimated runtime: 10 to 16 hours with humidifier. Two full nights of humidified therapy is realistic. Without humidifier, 30 to 40 hours.
Pros:
- 512Wh is enough for two nights of humidified CPAP or three to four nights without
- 500W continuous AC output with X-Boost to 750W
- Fast AC wall charging in about 60 minutes
- EcoFlow app with real-time monitoring
- LiFePO4, 3,000 cycles
Cons:
- 13.2 pounds makes it a two-hand carry
- Too large for air travel carry-on (over 100Wh and over 160Wh, both common airline limits)
- Premium pricing for the EcoFlow brand and app ecosystem
Best for: The best pick for users who want multi-night home backup or extended camping trips.
Bluetti AC70 — $499, 768Wh
The AC70 is the largest battery on this list and borders on being a small home backup system. At 768Wh, it can power a humidified CPAP for three or more consecutive nights.
Estimated runtime: 15 to 24 hours with humidifier. Three full nights is realistic at moderate settings. Without humidifier, 45 to 60 hours.
Pros:
- 768Wh is the highest capacity on this list by a wide margin
- 1,000W continuous AC output can power a CPAP plus other small devices simultaneously
- Supports 200W solar input for off-grid recharging
- LiFePO4, 3,000-cycle lifespan
- Turbo charging to 80 percent in 45 minutes
Cons:
- 22.5 pounds; this is not a grab-and-go battery
- Completely impractical for air travel
- Overkill for a single night of backup
- Fan runs noticeably under load
Best for: Users in areas prone to multi-day outages, full-time RV or van dwellers, or anyone who wants to charge the battery once and forget about it for several nights.
What to check before buying on Amazon
Amazon listings for portable power stations can be misleading. Before you click "Add to Cart," verify these five things.
1. Confirm the watt-hour rating, not just the watt rating. A battery advertised as "300W" has a 300-watt inverter, but that says nothing about capacity. You need the watt-hour (Wh) number. Divide the Wh by your CPAP's wattage to get approximate runtime in hours.
2. Check for pure sine wave output. CPAP machines require clean AC power. Modified sine wave inverters can damage your CPAP's motor or cause it to shut down. Every battery on this list uses a pure sine wave inverter, but cheaper units on Amazon may not.
3. Verify your CPAP's power requirements. Not every CPAP draws the same wattage. Check your machine's power supply brick for the watt rating, or look up your model in our CPAP battery compatibility guide. Running a 65W CPAP on a battery rated for 50W continuous will trip the overload protection.
4. Read the negative reviews for CPAP-specific complaints. Filter Amazon reviews by one and two stars and search for "CPAP" or "sleep apnea." Users who have actually tested a battery with a CPAP machine will flag issues like fan noise, auto-shutoff during low draws, and inverter incompatibility that the product listing will never mention.
5. Check the return policy and warranty. Most batteries sold directly by the manufacturer on Amazon include a manufacturer warranty of two to five years. Third-party sellers may not honor the same warranty. Buy from the official brand store on Amazon when possible.
Related reading
- The complete CPAP battery backup guide — covers everything from sizing to setup, including how to calculate your exact runtime.
- Jackery vs EcoFlow for CPAP — a head-to-head comparison of the two most popular portable battery brands for CPAP users.
- CPAP battery sizing guide — walks you through the math of matching your CPAP's power draw to the right battery capacity.
What to do next
If this list helped narrow your options but you want a recommendation tailored to your specific CPAP model, pressure settings, and use case, start with our best CPAP backup batteries guide. It ranks every major battery by CPAP compatibility, runtime, and value — not just what is available on Amazon — and includes setup instructions for the most popular ResMed, Philips, and Fisher & Paykel machines.
