EASYLONGER ES720 Review: Off-Grid CPAP Power Solution 2026

If you've researched CPAP batteries for any length of time, you've seen the ES720 in countless customer reviews — usually glowing ones. We hear from owners every week telling us they've had theirs for years, taken it on dozens of trips, and never had a single issue.

This review is exactly what it says: detailed, honest, and based on real testing. We'll cover what the ES720 does well, where it falls short, and who it's genuinely the right choice for. If you're shopping for a CPAP battery in 2026, this should help you decide.

ES720 At a Glance

Real-World Runtime Performance

We ran the ES720 against the most popular CPAP machines on the market. These numbers reflect actual end-to-end testing, not theoretical maximums:

Translation: for most CPAP users without humidifier, you'll get 2 solid nights. With humidifier on, expect roughly 4 hours — enough for a long nap or short flight, but not overnight.

What We Like

It's silent

The ES720 has zero fans. It runs completely silently — important when it's sitting on your nightstand. Some competitor batteries have small cooling fans that kick on under load and create a low hum that can wake light sleepers.

Pass-through (UPS) mode just works

Plug the battery into the wall, plug your CPAP into the battery, and you have a silent UPS. If grid power drops at 2am, your CPAP keeps running without interruption. We've heard from many customers that this single feature has saved their sleep during storms.

Universal CPAP compatibility

Out of the box, the ES720 includes DC cables for ResMed, Philips DreamStation, Fisher & Paykel, and BMC machines. Most competitors charge extra for these cables — we include them all.

Solar input

Pair with the ESP110 100W foldable panel and you can recharge during the day for off-grid trips. The 4–5 hour solar charge time is realistic — fast enough to be practical for week-long camping.

Where It Falls Short

4-bar battery indicator (the standard ES720)

The standard ES720 shows battery level with a 4-bar LED indicator — not a precise percentage. You know roughly where you are (25%, 50%, 75%, 100%), but not exactly. This is the single biggest limitation users mention. If precise battery percentage matters to you, get the ES720 PRO instead.

Lithium-ion lifespan vs. LiFePO4

The ES720 uses standard lithium-ion chemistry, rated for around 500–800 charge cycles. That's plenty for occasional use, but if you're using it daily as a home UPS, the LiFePO4 ES960 PRO (2,000+ cycles) will last 3–4x longer overall.

Not TSA-approved for flights

At 266.4Wh, the ES720 cannot be carried on commercial flights without prior airline approval — and many airlines won't approve over 160Wh. If air travel is your primary use case, the ES270 (99.9Wh) is the right choice. The ES720 is built for road trips, RV use, camping, and home backup.

ES720 vs. ES720 PRO: Which Should You Buy?

If you're choosing between the standard ES720 and the upgraded ES720 PRO, here's the breakdown:

Who Should Buy the ES720

After a year of customer feedback, the ES720 is the right pick for:

• Weekend campers who need 2 nights of off-grid CPAP power
• RV travelers with vehicle 12V charging access
• Home UPS users in regions with occasional power outages (storms, ice events)
• People who don't need humidifier on therapy

If you're a frequent flyer, get the ES270 instead. If you need maximum lifespan for daily UPS use, get the ES960 PRO with LiFePO4. The ES720 sits in the sweet spot for occasional travel and emergency backup.

Frequently Asked Questions

Will the ES720 work with my specific CPAP machine?

If you use a ResMed, Philips DreamStation, Fisher & Paykel, or BMC machine, yes. The DC cables included in the box cover all of these. For other brands, email support@easylonger.com with your CPAP model and we'll confirm compatibility.

Can I leave the ES720 plugged in all the time?

Yes — that's exactly what pass-through (UPS) mode is designed for. The battery has built-in charge management to prevent overcharging. Many of our customers leave theirs plugged in 24/7 as a permanent home UPS.

How long is the ES720 expected to last?

With normal use (occasional travel, home UPS standby), expect 5–7 years before noticeable capacity degradation. Heavy daily use will reach the 500–800 cycle limit faster — at which point the battery still works but holds less charge.

What's the warranty if something goes wrong?

All EASYLONGER batteries come with a 2-year warranty when you register your product. This is double the warranty Amazon offers — register within 30 days of purchase to get the full 24 months.

Can I store it for months without using it?

Yes, but charge it to about 50–70% before storing for long periods (6+ months). Lithium-ion batteries last longest when stored at moderate charge. Top up every 3–4 months to prevent deep discharge, which can damage the cells.