Porter-Cable® 20V MAX™ packs are sitting in a lot of American garages — and yes, they'll run a train horn. Here's exactly which BossHorn models take your packs natively, why the shared Stanley Black & Decker parentage with BLACK+DECKER®, Craftsman®, and DeWalt® does not mean the batteries interchange, and what the wind-down of the Porter-Cable cordless line means for you.
The short answer: your Porter-Cable® packs work — no adapter, no wiring
BossHorn builds the Quad Train Horn for Porter-Cable® 20v Battery with a native Porter-Cable 20V MAX battery mount in the handle. Your pack slides on the same way it clicks into a Porter-Cable drill — no adapter plate, no cutting into your truck's wiring, no air tank to mount. Pull the trigger or hit the included wireless remote (160 ft range, with an optional long-range remote that reaches up to 2,000 ft) and four powder-coated aluminum trumpets — 14", 12", 8", and 5" — push out up to 140 dB across three adjustable sound levels.
That's the whole answer for most people. The rest of this guide covers the details that trip people up: what "20V MAX" actually means on a Porter-Cable pack, which sibling-brand batteries do and don't fit, and why a battery-powered horn is arguably the best new use for a platform that isn't getting many new tools these days.
Porter-Cable® 20V MAX™ basics: voltage and pack sizes
First, the number on the label. Porter-Cable's own manuals spell it out in the fine print: the maximum initial battery voltage, measured without a workload, is 20 volts — the nominal voltage is 18. In other words, the Porter-Cable platform is electrically an 18-volt system, exactly like DeWalt's 20V MAX™ line and nearly every other "20V" brand sold in the US. That's also why one horn motor design can serve 18V and 20V-badged platforms alike; only the mount changes.
The official Porter-Cable pack lineup is compact:
| Pack | Capacity | Notes |
|---|---|---|
| PCC680L | 1.5Ah | Compact battery bundled with most drill kits |
| PCC682L | 2.0Ah | High-efficiency cells, 33% more runtime than the 1.5Ah |
| PCC685L | 4.0Ah | The largest official pack; works in all Porter-Cable 20V MAX tools |
The Porter-Cable-compatible horn is rated for packs from 2.0Ah up to 12.0Ah. The 1.5Ah PCC680L that came with your drill will physically fit the mount, but if you're choosing a pack, the 2.0Ah PCC682L or 4.0Ah PCC685L is the better starting point — more on blast counts below. Higher-capacity packs in the Porter-Cable mount exist, but they're third-party.
The Stanley Black & Decker family myth: sibling brands don't share batteries
Here's the question that fills forum threads: Stanley Black & Decker owns Porter-Cable, DeWalt, Craftsman, and BLACK+DECKER — so surely the 20V batteries interchange? Officially, no. Each brand uses its own connector and rail geometry, and none of the four lists cross-brand compatibility on its spec pages.
The nuance worth knowing:
- BLACK+DECKER® 20V MAX: the closest cousin. Hobbyists have long reported that Porter-Cable 20V and BLACK+DECKER 20V packs are physically near-identical, and some get them to interchange with minor trimming of the housing. We don't recommend modifying packs — but it explains why the two brands' batteries look so alike. If your garage runs on BLACK+DECKER packs instead, read our Train Horn for BLACK+DECKER® 20V battery guide and buy that mount.
- Craftsman® V20™: not compatible with Porter-Cable packs at all — the V20 line launched after Stanley Black & Decker acquired the Craftsman brand and uses its own interface. (An older Sears-era Craftsman "Bolt-On" system did share the Porter-Cable/BLACK+DECKER-style battery, but that line is long gone.) V20 owners have their own native option — see the train horn compatibility guide for Craftsman® V20 batteries.
- DeWalt® 20V MAX™: different rails, no direct fit. Third-party adapters that let a DeWalt pack drive Porter-Cable tools are widely sold, and the same logic applies to horns — covered next.
The adapter path: when it makes sense
Because BossHorn builds a native Porter-Cable mount, most Porter-Cable owners never need an adapter. The adapter conversation matters in one scenario: your Porter-Cable packs are aging out and you're migrating to another platform. Cross-brand adapters — for example, DeWalt-to-Porter-Cable — are widely sold and let old tools live on with new batteries. But adapters add a failure point, wiggle under vibration, and void nobody's warranty but your own patience.
Our advice is simpler: buy the horn for the battery platform you'll own next, not the one you're leaving. BossHorn sells the same horn in over a dozen mounts — Milwaukee®, DeWalt, Ryobi®, Makita®, and more — so check the full battery compatibility chart for all brands before you commit. And if you're set on running mixed-brand packs through one horn, the cross-brand battery adapter guide covers what actually works.
Why a horn is a smart buy for a legacy platform
Let's address the elephant in the workshop: Porter-Cable's cordless line has been wound down. Industry watchers have noted since 2020 that Stanley Black & Decker shifted its cordless investment toward DeWalt and the high-volume Craftsman V20 platform, and new Porter-Cable 20V tool releases have largely dried up. Your batteries, though, are still sold at major retailers — and they don't care whether the tool on the other end of the rails is a 2015 drill or a 2026 train horn.
That's what makes a battery train horn a genuinely good fit for Porter-Cable owners. You're not buying into the platform deeper — no new charger, no new ecosystem. You're giving packs you already own a second job: a 140 dB safety and signaling tool for the truck bed, the boat, the deer lease, or the tailgate. A horn draws power in short bursts rather than continuous runtime, so even modest packs go a long way: on a 6Ah battery the quad-trumpet model delivers 500+ short blasts, or roughly 200 sustained two-second blasts. A 2.0Ah pack proportionally fewer — still plenty for a season of game days.
Want more than 140 dB? The Extreme Series in a Porter-Cable® mount
The quad model covers most people, but if you want the loudest option, BossHorn's Extreme Series pushes past 150 dB with larger low-tone trumpets and a higher-output compressor. The flagship of that line is the Extreme Series Train Horn for Milwaukee® 18v Battery — and the same Extreme hardware ships with a native Porter-Cable 20V mount as the Extreme Series Train Horn for Porter-Cable® 20v Battery, so you don't have to switch battery brands to get the top-tier sound.
Every model in the Porter-Cable-compatible collection uses the same slide-on mount, so whichever tier you pick, your existing packs are the power source.
FAQ
Do I need to modify my Porter-Cable® battery or add any wiring?
No. The horn's handle has a native Porter-Cable 20V MAX mount — the pack slides on and locks exactly as it does on a Porter-Cable tool. There is no vehicle wiring, no compressor tank, and no permanent installation; the whole unit is a self-contained 4 lb horn gun you can carry between your truck, boat, and garage.
Will a BLACK+DECKER® or Craftsman® battery fit the Porter-Cable mount?
Not without modification, and we don't recommend trying. BLACK+DECKER 20V packs are physically similar but not a drop-in fit, and Craftsman V20 packs use a different interface entirely. Each BossHorn model is built for one battery platform — buy the mount that matches the packs you own.
How many blasts do I get per charge?
On a 6Ah pack, the quad-trumpet Porter-Cable-compatible model is rated for 500+ short blasts or about 200 sustained two-second blasts. Since the official Porter-Cable lineup tops out at the 4.0Ah PCC685L, expect proportionally fewer per charge — and keep in mind the horn accepts packs from 2.0Ah to 12.0Ah, so a third-party high-capacity pack in the Porter-Cable mount extends that further.
Porter-Cable isn't releasing new 20V tools — is this a dead-end purchase?
The horn only cares about the battery, and Porter-Cable 20V MAX packs remain widely available at major retailers. If you ever do migrate platforms, the same horn exists in Milwaukee®, DeWalt®, Ryobi®, Craftsman®, and a dozen other mounts — the trumpets and sound are identical; only the battery interface changes.