CEENR® 300W 4-Slot Power Inverter for 18V/20V Tool Batteries

18V/20V slide batteries (DC 15–21V input) that fit one of its 10 adapter options, which cover 9 brands: DeWalt 20V MAX, Milwaukee M18, Makita 18V LXT, Bosch 18V (blue), BLACK+DECKER 20V MAX, Craftsman V20, Porter-Cable 20V MAX, Worx 20V PowerShare (WA3520-style), Worx 20V (WA3551-style), Einhell 18V Power X-Change. OEM and CEENR packs both work. Each battery clicks into a brand adapter, and each adapter clicks into one of the four slots. Match the adapter to your pack: Worx sells two pack styles (North American WA3520-style PowerShare and WA3551-style), and the Bosch adapter is for blue Bosch 18V packs, not green POWER FOR ALL. Ryobi ONE+ adapters are not offered.

When you order, tap a brand to fill each of the four slots on this page — mix brands, or use the same brand in more than one slot. Add to Cart unlocks only once all four are chosen, and the four adapters ship with each inverter. Your picks show on the cart line and on your order. Choose the number of sets to buy the same setup more than once. For different setups, add each one separately. Extra adapters are also sold on their own and are added once per checked item.

No. It runs on one to four batteries. With more than one installed it uses one pack at a time and switches to the next automatically when the current pack runs flat, so more packs mean longer runtime. When every battery is depleted, all outputs shut off and a flashing low-battery icon appears on the LCD.

Everyday loads whose combined draw stays under 300W: laptops and monitors, LED work lights, fans, a Wi-Fi router and modem, phone, camera and drone chargers, string lights and small electronics. It is not for high-watt appliances such as space heaters, kettles, microwaves, coffee makers or hair dryers. The AC outlet is a modified sine wave, so some sensitive electronics and medical devices may not work properly.

It depends on the batteries and the load. A pack stores roughly its amp-hours × 18V in watt-hours — a 5.0Ah pack is about 90 Wh nominal, so four of them hold about 360 Wh — and the inverter uses some of that energy in conversion, so a steady load runs for somewhat less than that figure divided by its watts. The LCD shows each battery channel's charge and the live AC watts, so you can see how fast you are drawing it down.

It is built for North America: the AC outlet is a standard US 120V / 60Hz socket. It is not a 230V inverter, so it is not suitable for European or UK appliances. The USB-C (45W) and USB-A ports charge phones, tablets and many USB-C laptops anywhere.

No. CEENR is an independent brand. This inverter and its adapters are engineered by CEENR to work with the listed battery platforms — they are not made by, sold by, or affiliated with DeWalt, Milwaukee, Makita, Bosch, BLACK+DECKER, Craftsman, Porter-Cable, Worx or Einhell. Those names are trademarks of their respective owners, used only to indicate compatibility.

A 3-year limited warranty from the date of purchase, plus a 30-day return window — email info@ceenr.com within 30 days of delivery for the return address; you ship it back and we refund your order plus the return shipping once it passes inspection.