Dewalt 8 Amp Battery, Car Charger, Cargo Box & Dashcam: A Fleet Buyer's Comparison

When I took over purchasing for a 40-person mechanical contractor in 2020, our field fleet was a mess. Fourteen vans, each outfitted by a different tech with different tools and opinions. Equipment went missing. Batteries were always dead. Nobody agreed on charging, cargo storage, or even whether to mount dashcams at all.

In our 2024 vendor consolidation project, I finally standardized everything. That meant testing two configurations before I wrote the purchase order—I'll call them Setup A and Setup B. The comparison came down to four decisions that showed up in almost every van we outfitted:

1. Dewalt 8 amp battery vs. the 5Ah we'd been buying
2. A Dewalt car battery charger vs. charging at the shop
3. A hard lockable box for cargo vs. soft tool bags
4. GPS vs. GPS-free dashcam—and the best position for it

If you're outfitting company vans, this should save you the six weeks of trial-and-error we went through. I'm writing this from a procurement perspective, so I'll keep the numbers practical and the conclusions honest.

Battery: Dewalt 8 amp battery vs. the 5Ah we'd been using

The first argument every tech has is capacity vs. weight. Our old kits came with 5Ah batteries. When I started ordering higher-draw tools—circular saws, grinders, reciprocating saws—I switched the spec to the Dewalt 8 amp battery (8Ah). The math is simple: at 20V, a 5Ah pack holds roughly 100Wh and an 8Ah holds 160Wh. That's 60% more runtime, which for a crew cutting or grinding all morning is the difference between finishing one job and hunting for a charger mid-job.

Cost was the surprise. The 8Ah ran about 50–60% more than the 5Ah—or rather, about 55% more on the street price when you count the two-pack promos we usually buy in January. Since capacity increases faster than the price premium, the cost per watt-hour is actually better on the 8Ah. Per FTC guidance at ftc.gov, performance claims need to be substantiated, and the runtime claim is one we verified on real job sites before we standardized.

The catch is weight. The 8Ah adds roughly a pound to the tool. On a drill in a ceiling grid, that extra pound pulls on your wrist. Overhead screwdriving goes from tiring to annoying in about twenty minutes. The 5Ah battery is the one our techs reach for when they'll be holding the tool above shoulder height all afternoon.

Everything I'd read said to buy the largest Ah for "future-proofing." In practice, we found the opposite for fine-motor work. The 8Ah was too heavy for general drill-and-drive duty; the 5Ah ran those tools all day without complaint. So we standardized on the 8Ah for high-draw tools and kept the 5Ah for anything used overhead.

Conclusion: if a van can carry only one spare battery, make it the 8Ah—but pair it with high-draw tools. For everyday drilling and driving tasks, the 5Ah is the better ergonomic and financial choice.

Charging: Dewalt car battery charger vs. shop-only charging

Before 2024, every van brought its batteries back to the shop at night. Wall chargers, spares in a drawer, done. That system fell apart the first time a tech finished a job in one town and drove 45 minutes to the next—with two dead batteries and no electrical outlet in sight.

That's the use case for the Dewalt car battery charger. It's a compact 12V charger that plugs into the van's auxiliary power outlet and charges 20V MAX batteries while the vehicle is running. It's slower than the wall unit—figure a few hours for a full charge from empty—so it's not a rescue device. Put another way: if your team drives 30 minutes between calls, that's 30 minutes of charging they get for free, and dead-battery calls to you at 3pm drop fast.

In my first year, I almost skipped the brand-name charger and bought a rack of third-party units. The supplier said they were "just as good." The first two batteries that died that month were both charged on those units (surprise, surprise). Since then, we buy only Dewalt chargers. The roughly $35 difference per unit translated into zero fried battery packs in 2024—a trade I'd make again.

The inverter question came up during our consolidation, too. A 400W inverter can run a standard wall charger, but it pulls the van's battery harder and adds an inefficient middle step. The car charger draws DC current directly from the 12V outlet and is a cleaner fit for a service van that idles between stops.

Conclusion: the Dewalt car battery charger is a yes for any van that travels between job sites. It doesn't replace the shop charger; it's the difference between arriving with a dead battery and arriving with a usable top-up.

Cargo: a hard box for cargo vs. soft tool bags

Next: where do the tools live between jobs? We tested both approaches side by side.

Setup B used a hard, lockable box for cargo—a TSTAK-style stack or a bolted-down truck box. It keeps drills, saws, and batteries in fixed positions and locks when the van sits alone in a parking lot. Cost was roughly $120–180 per van. Setup A used soft-sided tool bags, at $40–60 each. They're lighter, cheaper, and more flexible: you can throw one bag onto a rolling cart and carry it into a lobby without hauling a box.

The surprise came from how our crews actually behave. Service techs didn't come back to the shop between calls; they carried the tools they needed in a bag and left the rest in the van. The commercial crew, on the other hand, parked overnight on a job site. One night a van got raided. The hard box saved the expensive items; the tech's personal bag—which he left on the seat, sigh—did not.

Also, "water resistant" does not mean "hose-proof." We assumed a hard box with a rubber seal would shrug off rain. Then one came back from an afternoon storm with damp contents. Learned never to assume water-resistant means waterproof after pulling soaked tool bags out of a sealed box.

Conclusion: for dedicated vehicles, a hard box for cargo wins on security and organization—at least, that's been our experience with 14 vans and two very different crews. For rotating crews and multi-stop days, soft bags are the more practical pick. Either way, treat water resistance as a convenience, not a guarantee.

Dashcam: GPS vs. GPS-free, and the best position for dashcam mounting

The mounting location comes first, because no dashcam is useful if it captures the sun, the wipers, or the driver's hand in every frame. After testing three positions across six vans, the best position for dashcam is behind the rearview mirror: centered, with the lens just below the mirror housing. It stays out of the driver's sight line, is hard to spot from outside (so it's less of a theft target), and the mirror shades the lens in harsh light.

We tried the passenger-side top corner—tilted horizon, missed part of the road. We tried the driver-side low corner—worse, plus it kept getting knocked when techs reached for the dash. Both were moved within a week. Behind the mirror is where the installer put ours and where they've stayed.

Then there's the rulebook. If you've researched GPS-free navigation regulations, here's the short version: no federal rule forces you to install GPS in a service van. The actual rules that matter are:

• Distracted driving. Commercial drivers can't hold a phone for navigation (see FMCSA rules on CMV driver phone use). A dashcam with navigation, or a phone in a mounted cradle, is fine; a hand-held phone is not.
• Windshield obstruction. Many states restrict what can sit in the driver's swept area. Behind the mirror is usually the safe zone, but verify your state's exact rule before mounting.
• Employee privacy. A dashcam with GPS records location data, which creates a record your company may have to produce in a dispute. The FTC has been increasingly focused on location-data practices, so a clear, documented dashcam policy is not optional.

We tested GPS-enabled dashcams in three vans. The tracking helped with route reviews and helped settle a dispute about whether a tech had stopped for two hours (he had). It also created a data trail the company had to defend in a workers' comp claim (ugh). The rest of the fleet went GPS-free—video only, no location log.

Conclusion: the GPS-free dashcam is the safer default for a small company, and the best position for dashcam is centered behind the mirror. Buy the GPS version only if you actively need route-level tracking and have the privacy policy to support it.

Bottom line: two rigs, two jobs

No single setup fits every crew. Here's the decision rule I'd hand to whoever replaces me:

Go with the mobile workshop—8Ah batteries, car chargers, hard cargo box, GPS dashcam—when your crew runs high-draw tools on multi-stop days, when vans are assigned to the same person and parked overnight on site, and when you want route-level visibility.

Go with the light rig—5Ah batteries, shop charging, soft bags, GPS-free dashcam—when your crew does service calls with light power needs, when vehicles rotate between techs, and when you'd rather not defend location data in a dispute.

If I had to pick one setup for our 14 vans tomorrow, I'd buy the 8Ah batteries, the car chargers, and the soft bags—and mount GPS-free dashcams behind the mirrors. That combination covers the most scenarios without locking you into a hard cargo box that becomes wasted space on light days.

Prices are as of January 2025 and vary by vendor and promotions, so verify current rates before you write the PO. Regulations change too—check official state and FMCSA sources for current requirements.