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53L Dual Zone | 299Wh Battery | -4F to 68F
Anker EverFrost Dual-Zone Portable Cooler 50: Fridge and Freezer at the Same Time, Off One Battery
Dual zone is the feature that matters here. Two independently controlled compartments mean you can freeze meat on one side and keep drinks at 39 F on the other, from a single 53 L cooler, without the compromise of picking one temperature for everything. The range runs from -4 F to 68 F, so both ends are genuinely available.
It runs on a detachable 299 Wh battery which Anker rates at up to 42 hours holding 39 F, and which doubles as a power bank with a 60 W USB-C port and two 12 W USB-A ports. Four charging paths: AC wall outlet, car socket, USB-C, or a 100 W solar panel. Note this is the original EverFrost line, not the EverFrost 2, and the batteries are not interchangeable between them.
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Why the EverFrost 50
Two Zones, Two Temperatures
Freeze on one side, chill on the other, controlled independently. That is the whole argument over a single-compartment cooler, and it is what stops you choosing between frozen meat and cold drinks.
-4 F to 68 F
A real compressor with real freezer capability, not a thermoelectric box that struggles on a hot day. No ice, no meltwater, no losing volume to a bag of cubes.
Detachable 299 Wh Battery
Rated by Anker at up to 42 hours holding 39 F. It comes out of the cooler, so a second one can charge while the first works, and it doubles as a power bank.
Four Ways to Charge
AC wall outlet, car socket, USB-C, or a 100 W solar panel. The solar option is what makes multi-day off-grid use realistic rather than theoretical.
Battery Doubles as a Power Bank
A 60 W PD USB-C port and two 12 W USB-A ports on the battery itself, so the pack you carry for the cooler also charges phones and cameras at camp.
Built to Be Moved Loaded
Wheels and handles sized for a 53 L cooler carrying food and ice packs, because a cooler you cannot move when full is a cooler you leave in the driveway.
Solar panels are sold separately; the cooler accepts a 100 W panel. A second 299 Wh battery is also sold separately and roughly doubles runtime. Note that this is the original EverFrost cooler and it uses a 299 Wh battery. The newer EverFrost 2 range uses a 288 Wh battery and the two are not interchangeable.
Cooling and Capacity
Figures below are from Anker's published specifications for the EverFrost line.
Model
A17A21M1
Capacity
53 L
Zones
2, independently controlled
Temperature Range
-4°F to 68°F (-20°C to 20°C)
Cooling Type
Compressor
Runtime at 39°F
Up to 42 hours on one battery
Dimensions
37.9 × 16.9 × 19.1 in (962 × 430 × 487 mm)
Battery and Charging
Battery
299 Wh, detachable
Battery USB-C Output
60 W PD
Battery USB-A Output
2 × 12 W
Charging Methods
AC wall outlet, car socket, USB-C, solar
Solar Input
100 W
Second Battery Support
Yes, sold separately
Anker notes that product specifications are subject to change without notice, and runtime figures come from testing under controlled conditions. Real results vary with ambient temperature, how full the cooler is and how often the lid is opened.
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Call (303) 876-7654. We would rather spend ten minutes sizing your system correctly than process a return later.
Anker EverFrost Dual-Zone Portable Cooler 50: Fridge and Freezer at the Same Time, Off One Battery: Frequently Asked Questions
Is this the same as the EverFrost 2?
No, and the distinction matters if you are buying accessories. This is the original EverFrost line, which uses a 299 Wh detachable battery. The EverFrost 2 range uses a 288 Wh battery, and the two are not interchangeable. Check which cooler you own before ordering a spare battery, or call us at (303) 876-7654 and we will confirm it.
What does dual zone actually mean in practice?
Two compartments with independent temperature control, so one side can hold frozen meat at -4 F while the other keeps drinks and produce at 39 F. On a single-zone cooler you pick one temperature and everything lives with it, which usually means either frozen lettuce or warm beer.
How long does one battery last?
Anker rates up to 42 hours holding 39 F. That figure assumes reasonable ambient temperature and a lid that is not being opened every ten minutes. Running the freezer zone hard, a hot day, or a full cooler being opened frequently will all bring it down considerably. Plan for less and treat 42 hours as the ceiling.
Can I run it off my car while driving?
Yes, through the included car charging cable, which is the usual arrangement on a road trip. It also charges from a wall outlet at home before you leave, from USB-C, or from a 100 W solar panel once you are parked.
Can I buy a second battery?
Yes, sold separately. Two batteries roughly doubles runtime and lets you swap a fresh one in while the other charges, which is what makes a week-long trip workable rather than a two-day one. Make sure you order the 299 Wh version for this cooler.
Does the battery work as a power bank?
Yes. The 299 Wh pack has a 60 W PD USB-C port and two 12 W USB-A ports, so it charges phones, tablets and laptops as well as running the cooler. On a camping trip that is a genuine second use rather than a marketing line.
Will it survive being outdoors?
It is built for outdoor use and travel, but treat it as weather-resistant rather than weatherproof. Keep it out of standing water and heavy sustained rain, and do not submerge it or the battery compartment.
Why does the compressor cycle on and off?
That is a refrigerator working correctly. Once a zone reaches its setpoint the compressor stops to save power, then restarts as the temperature drifts up. The cycling is exactly what makes the 42 hour runtime figure possible.
