Ecarke 200W Portable Power Inverter Compatible with DeWALT 20V,Ecarke Real 200W Outdoor Generators with 2 USB&Type-C&AC,DC 20V to AC 110V Portable Power Station, Charger Adapter Battery Powered Outlet

What it is and who it’s for

Ecarke’s 200W battery inverter is a simple idea executed well: clip it onto a DeWalt 18V/20V MAX lithium-ion battery and you’ve got a small AC outlet plus two USB-A ports and a bright work light. If you already own a stack of DeWalt packs, this turns them into a pocketable power station for lights, phones, routers, small fans, and other low-wattage devices. It’s not a replacement for a big pure-sine inverter or a dedicated power station, but it fills a useful gap for jobsites, camping, and short power outages.

Design and build

The unit is compact and light enough to toss in a tool bag without a second thought. It locks onto DeWalt packs with a positive click and sits flat and stable when a battery is attached. The single-button interface is straightforward: press to power on, hold to toggle the LED work light brightness levels, and watch a multicolor indicator ring for status and protection events. The AC receptacle is a standard 110–120V outlet on the face, with two 5V/2.1A USB-A ports alongside. Fit and finish are better than I expected at this price; nothing creaks, and the battery shoe tolerances feel accurate.

The head-mounted LED work light is more than an afterthought. It’s bright, adjustable roughly 75 degrees, and throws a wide, even beam without hotspots. As a task light that can also run a plug-in lamp, it’s surprisingly handy.

Ports and output

• AC: 110–120V, rated 200W (modified sine wave)
• USB-A: two ports, each 5V up to 2.1A (no USB-PD or QC advertised)
• LED work light: three brightness levels, adjustable head

The inverter includes overload, overcurrent, overheat, and low-voltage protections. There’s a low-voltage cutoff around 15V, which is appropriate for 18V nominal tool packs and helps avoid deep discharging your batteries.

As with virtually all compact inverters in this class, the AC output is modified sine wave. Most chargers, LED lamps, and small fans don’t care. Some sensitive electronics and certain heating pads or audio gear may buzz, run less efficiently, or simply refuse to operate. Plan accordingly.

Performance and runtime

I tested the unit on several DeWalt 20V MAX packs (2Ah, 4Ah, and 5Ah). A few observations and rough numbers you can bank on:

• Idle draw: When the inverter is switched on with no load, it pulls a small but steady current from the battery. On my meter I saw roughly a tenth of an amp at pack voltage, which will drain a 4Ah pack in a day or two if you forget to switch it off. When the unit is off, draw is effectively negligible.
• USB charging: The two USB-A ports charge phones and accessories at legacy “fast” 10W speeds. It’s not USB-PD, but I still topped up a modern Android phone from ~5% to near full in well under two hours. Both ports can be used simultaneously without drama.
• AC light loads: A 16W screw-in LED bulb ran right around four hours on a healthy 4Ah pack, which matches the math: a 4Ah, 18V battery stores ~72Wh; factor ~80–90% inverter efficiency and you get ~60Wh to the bulb. Drop to a 10W bulb and you can stretch that to 6 hours on the same pack.
• AC medium loads: A 45–60W laptop charger worked fine and is a reasonable use case. Expect roughly 60–90 minutes on a 4Ah pack, 2–2.5 hours on a 5Ah pack, depending on charger draw and battery health. The cooling fan kicks on under sustained AC load; it’s audible but not obnoxious.
• Onboard light: The built-in LED will run for tens of hours at lower brightness and around 20+ hours on high from a 4Ah battery. It’s genuinely useful light for campsite chores or illuminating a work area.

One quirk: with only the onboard light on very low brightness or with extremely small loads, the inverter sometimes went to sleep after a while. Keeping a tiny additional load on—like leaving a USB device plugged in—kept it awake. Not a deal breaker, but worth knowing.

Waveform and device compatibility

Because this is a modified sine wave inverter, there are a few practical limits:

• Great with: LED bulbs, phone and tablet chargers, small fans, Wi‑Fi routers, camera chargers, and other switch-mode power supplies up to about 150W.
• Be cautious with: Devices with heating elements that use electronic controllers (some heating pads), audio equipment, and anything that’s picky about input power quality. These can buzz, run hotter, or fail prematurely on modified sine wave.
• Avoid: High-wattage appliances (kettles, hair dryers, space heaters), large AC motors, or mission-critical medical devices. They’ll either exceed the 200W limit or aren’t appropriate for this inverter class.

If you need guaranteed compatibility for sensitive gear, look for a pure sine wave inverter. For general-purpose, light-duty uses, this unit is fine.

Battery management and protections

The low-voltage cutoff around 15V is conservative enough to protect tool packs without relying solely on the battery’s internal BMS. Efficiency is in the 80–90% range, consistent with the runtimes I saw. Thermal management seems sensible: under heavier loads, the fan spins up promptly, and the unit will shut down on over-temperature rather than cook itself—or your battery.

A tip from testing: because the on-state idle draw isn’t trivial, make it a habit to click the unit fully off when you’re done. Your batteries will thank you.

Everyday use and ergonomics

In practice, the Ecarke is the kind of tool that ends up living in a backpack or glovebox because it solves a bunch of small problems:

• Power a lamp in a dark corner without running an extension cord.
• Keep a router up during a short outage.
• Run a USB fan at a campsite, while topping up phones.
• Charge camera batteries in the field.

The integrated light reduces the number of things you have to carry, and the single-button interface is refreshingly simple. The LED indicator ring is easy to read, though I’d love a percentage readout or bars for the attached battery’s state of charge.

Noise-wise, there’s a low fan whir under AC load and, with certain AC devices, a bit of inverter buzz. It’s normal for a modified sine unit and not excessive.

What it’s not

It’s worth stating plainly what this isn’t:

• It’s not a high-capacity power station. A 5Ah, 20V MAX pack holds around 90Wh. That’s great for light duty, not for running appliances for hours.
• It’s not pure sine wave. If you need guaranteed compatibility across tricky loads, this isn’t the right tool.
• It’s not a good match for high-draw heaters or anything near the 200W ceiling for long durations; give yourself headroom for efficiency and heat.

Wish list

• USB-C with PD would modernize the USB side nicely.
• A “keep alive” mode or configurable sleep behavior would prevent the occasional auto-shutoff on very light loads.
• A pure sine variant at a slightly higher price would broaden compatibility for sensitive gear.

Bottom line

As a compact bridge between your DeWalt batteries and the devices you actually use day to day, the Ecarke 200W inverter earns its keep. It’s efficient enough, the protections are sensible, the LED work light is genuinely useful, and the form factor makes it a no-hassle addition to a kit bag. Respect the 200W ceiling, understand the limits of modified sine wave, and you’ll find it reliably powers lights, small electronics, and other light-duty AC loads with minimal fuss.

Recommendation: I recommend it for anyone already invested in DeWalt 18V/20V MAX batteries who wants portable, light-duty power without buying a full power station. It’s ideal for camping, jobsites, and short outages where you need to run a lamp, a router, a small fan, or charge phones and cameras. If you need to support sensitive audio gear, specialized heating pads, or anything that insists on a pure sine wave—or if you plan to run 150–200W loads for long stretches—look at a pure sine alternative or a larger dedicated power station. For everyone else, this is a practical, cost-effective accessory that extends the usefulness of the batteries you already own.