Building a Mobile Mechanic Kit: What Lives in the Truck, What Stays in the Shop
The 14-tool cordless mobile kit that covers 90% of service calls, plus the 4 tools worth keeping in the shop.
A complete mobile mechanic kit is 14 cordless tools + a battery rotation, fitting in a 3-PACKOUT stack on a rolling base under $2,500. The four tools that stay in the shop — 1-inch impact, core drill, shop press, tire machine — are the ones that are too heavy or too niche to justify a truck slot. Everything else pays its rent on mobile service calls.
The 14-tool cordless core
M18 FUEL 1/2" impact wrench (2767-20): lug nuts, ball joints, suspension. The daily driver. $249 bare.
M12 FUEL stubby impact (2555-20): tight engine bay, brake caliper bolts. $179 bare.
M12 FUEL 3/8" ratchet (2557-20): repeat-turn work. $179 bare.
M12 FUEL 1/4" ratchet (2568-20): interior trim, plastic fasteners. $159 bare.
M12 FUEL compact drill (3404-20): drilling, pilot holes. $179 bare.
M12 1/4" impact driver (3453-20): bolt-out on stripped hardware. $159 bare.
M18 FUEL reciprocating saw (2821-20): exhaust work, rusted bolts cutoff. $149 bare.
M12 inspection camera (2311-20): engine bay, transmission tunnel. $199 kit.
M12 thermal imager (2258-21): electrical diagnosis, brake drag check. $299 kit.
M18 work light (2366-20): flood for under-vehicle. $99 bare.
M12 compact vacuum (0940-20): interior cleanup before handoff. $99 bare.
M12 jump starter (2982-20): dead-battery calls. $159 kit.
M18 tire inflator (2848-20): roadside tire service. $149 bare.
Milwaukee M18 3.5 HP inverter (2845-20): 120V AC for occasional scan tool or soldering iron. $499 bare.
Battery rotation
4x M18 5.0Ah XC: run the impact, recip saw, work light, inverter. $99 each.
3x M12 4.0Ah XC: run the stubby impact, ratchets, drill, camera, thermal, compact vac. $79 each.
1x M12/M18 rapid charger (48-59-1812): dual-bay. $99.
Total battery/charger spend: ~$732.
What stays in the shop
1" impact wrench (M18 2868-20 or pneumatic): only for axle nuts / semi truck work. Stays on the shop's floor air line.
Core drill / diamond coring: once-a-year job. Rent or keep a shop-only unit.
Arbor press: stationary by nature.
Tire machine / balancer: obvious.
The rule of thumb: if the tool weighs more than 20 lbs or costs more than $800, it probably stays in the shop.
Total kit cost
Bare tools: ~$2,855. Batteries + charger: ~$732. PACKOUT 3-box stack: ~$290. Rolling base: ~$149. Hand-tool fill-in (sockets, wrenches, test light, multimeter): ~$400-600.
Kit all-in: $4,400-4,600 for a fully-outfitted mobile mechanic truck, brand-new tools, zero compromise. Kitted variants (with batteries included) at retail equivalent: ~$5,400-5,800.
Joshua runs Charged Tools out of St. Louis. Background spans e-commerce operations, software engineering, and hands-on tool use in the auto trades. Every editorial piece on this site is written or reviewed by Joshua before it ships.
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FAQ
Can I do this on DeWalt 20V MAX instead?+
Yes — DeWalt has cordless equivalents of every tool on the list except the M12 stubby impact (the 12V XTREME sub-compact line is close but not as good). If you're brand-loyal to DeWalt, substitute DCF899 for 2767-20, DCF902 for 2555-20, DCF503 for 2557-20, DCF513 for 2568-20, DCD791 for 3404-20, DCF842 for 3453-20, DCS367 for 2821-20.
How long does the M12 inspection camera actually last on a service call?+
8-10 minutes of active recording per 4.0Ah pack. If you do a lot of camera work, consider the 2319-22 (corded/cordless hybrid) which plugs into 12V vehicle power when a battery dies.
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