Short answer: not directly. We don't build a train horn gun with a Worx® battery mount, so a Worx 20V PowerShare® pack won't click onto any of our horns out of the box. The good news is that the voltage is a match, the workarounds are simple, and most Worx owners are one inexpensive decision away from a horn that blasts.
The Short Answer: Right Voltage, Wrong Rail
Every battery train horn gun is built around one specific battery rail — the plastic slide, latch, and terminal block that the pack locks into. Our horns come with native mounts for Milwaukee® M18™, DeWalt® 20V MAX™, Ryobi® ONE+™, Makita® 18V LXT®, Bosch® 18V, Ridgid®, Craftsman® V20, Bauer®, Hart®, Hercules®, and Kobalt®. Worx isn't on that list, and a Worx pack's rail and terminal layout don't match any of those mounts.
So this isn't like the Makita XGT or Ryobi 40V situation, where the pack is simply the wrong voltage. A Worx 20V pack is electrically in the same class as the batteries our horns are designed for. The problem is purely mechanical: the shape of the connection. That distinction matters, because it's what makes an adapter a realistic option here instead of a hard no.
If you want to see which pack pairs with which horn at a glance, our train horn battery compatibility chart by brand lays out every supported platform.
What "20V PowerShare" Actually Means
Worx sells its 20V PowerShare battery as a shared platform. One pack runs its handheld tools; snap on a second and it powers the 40V tools; four packs run the 80V line. Worx says the same battery works across 140+ PowerShare products, from drills to leaf blowers to lifestyle gear. The platform dates to 2017, and Worx lists its PowerShare PRO packs as fully compatible with all 20V, 40V, and 80V PowerShare products.
The "20V" on the label is the same marketing convention DeWalt uses on 20V MAX. It's the peak voltage of a freshly charged pack with no load. The working (nominal) voltage is 18V, because the pack runs five lithium-ion cells in series at roughly 3.6V each. That's the exact same cell arrangement as an M18, 20V MAX, or ONE+ pack.
| Pack | Label | Nominal voltage | Fits our horn mounts natively? |
|---|---|---|---|
| Worx 20V PowerShare | 20V | 18V | No — no Worx mount |
| DeWalt 20V MAX | 20V MAX | 18V | Yes |
| Milwaukee M18 | 18V | 18V | Yes |
| Ryobi ONE+ | 18V | 18V | Yes |
One thing Worx owners sometimes assume: that since two packs make 40V, you could stack packs for a louder horn. Don't. A horn gun is an 18V-class device that takes exactly one battery. The 40V and 80V stacking only happens inside Worx's own multi-battery tools.
Also watch for older Worx gear. The legacy Worx 18V, 24V, and 32V lines are separate systems and don't interchange with PowerShare. And PowerShare packs themselves come in different pin layouts — 6-pin is the common North American version, while 4-pin packs are mostly sold in the UK, Europe, and Australia. Those two look alike but aren't physically compatible, which matters the moment you shop for an adapter.
Can You Use an Adapter?
Mechanically, maybe — but your options are thin. Most Worx adapters on the market go the other direction: they let a DeWalt or Milwaukee battery run a Worx tool. One large adapter specialist lists 13 adapters for powering Worx tools with other brands' packs, and just one that lets a Worx 20V PowerShare pack power another brand's tool (a Ryobi ONE+ mount). A few sellers also offer Worx-battery-to-Milwaukee M18 or DeWalt 20V MAX adapters, some only for the less common 5-pin packs.
If you find the right one for your pin layout, it will likely fire the horn, because there's no voltage to convert between two 18V-nominal systems. But you give up real things:
- No battery-management communication. The Power Tool Institute points out that batteries, chargers, and tools from different manufacturers don't talk to each other, and an adapter can bypass the protective electronics. Its recommendation is to use only the batteries listed in the tool's manual.
- No charging through the adapter. Adapter makers are clear on this: always pull the battery out of the adapter and charge it on its own Worx charger.
- Low-voltage cutoff is on you. Depending on the pairing, the horn may not shut down when the pack gets low. Deep-discharging lithium cells damages them, so stop as soon as the blast starts to sag.
- Warranty exposure. Non-OEM adapters can void coverage on both the pack and the device it's powering.
We walk through all of this in more depth, with pros and cons for each pairing, in our guide to using a cross-brand battery adapter on a train horn gun. The same caution applies to no-name clone packs — see whether aftermarket batteries are safe in a horn gun.
What Worx Owners Should Do Instead
Here's the honest ranking, from simplest to most hands-on.
- Check your shelf for a second platform. Plenty of Worx households also have a drill or a blower on another battery system. If there's an M18, 20V MAX, ONE+, or LXT pack in the garage, pick the matching horn and you're done — no adapter, full battery protection, no new charger.
- Buy one pack from a supported platform. If Worx is all you own, adding a single battery and charger from a supported platform is usually a cleaner deal than living with an adapter. Pick the platform you'd most likely grow into later; every horn we build runs on a single standard pack from its brand.
- Try the adapter route, eyes open. If you already own a Worx-battery adapter for the right pin layout and target mount, it can work on a horn. Keep blasts short, stop before the pack runs flat, and never charge through the adapter.
- Go DIY with a brushless drill. Our universal DIY train horn gun kit with 4 trumpets is built around a brushless drill rather than a fixed battery mount, so it's the flexible option if you'd rather work with a tool you already have. Check the kit's listing for drill requirements before you commit.
If you're starting fresh with a new platform, the 5-Trumpet Horn Gun for Milwaukee® 18V Battery is our flagship: five trumpets, and it runs on any M18 slide-on pack. For a smaller setup, our quad horn guns come in versions for nearly every supported battery brand.
Worx 20V vs. the Other "Not Natively" Batteries
Worx sits in a different spot than the other batteries we get asked about that don't have a native mount. Ryobi 40V and Makita XGT packs are the wrong voltage — roughly double what a horn built for 18V packs can handle — so an adapter is a genuinely bad idea there. You can read why in our posts on Ryobi 40V batteries and train horn guns and Makita XGT 40V compatibility.
Worx 20V PowerShare, by contrast, is the right voltage with the wrong connector. That's why the adapter route is at least on the table for Worx owners — with the caveats above — while it's off the table for 40V packs.
FAQ
Do you sell a train horn gun with a Worx battery mount?
No. Our horns are built with native mounts for Milwaukee, DeWalt, Ryobi, Makita, Bosch, Ridgid, Craftsman, Bauer, Hart, Hercules, and Kobalt batteries. Worx owners can use an adapter, add a pack from a supported platform, or go the DIY drill-kit route.
Will two Worx 20V packs make a horn louder?
No. A horn gun takes one 18V-class battery. Worx's 40V output only comes from pairing two packs inside Worx's own 40V tools, and there's no safe way to feed 40V into a horn built for 18V packs.
Is a Worx 20V battery the same voltage as a DeWalt 20V MAX pack?
Electrically, yes. Both are 18V nominal and 20V at peak, built from five lithium-ion cells in series. The rails and terminals are different, so they don't fit each other's mounts without an adapter.
Can I charge my Worx pack while it's in an adapter on the horn?
No. Adapter makers say not to connect an adapter to any charger. Take the pack out and charge it on its own Worx charger.