Auto
Car accessories and maintenance gear.
Deciding what to buy
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Battery Charger or Maintainer: Sizing Amps for Winter Storage
How to size a charger or maintainer to your battery's Ah rating for winter storage, with published amperage, float stages and cold ratings compared.
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Wireless vs Wired Backup Camera: What Trucks and Trailers Need
How to read open-area vs at-speed wireless range for a truck and trailer, when a wired camera removes the question, and what seven kits publish.
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OBD2 Scanners That Read ABS and Airbag Codes vs Engine-Only Readers
Which OBD2 scanners actually read ABS, airbag and transmission codes, which only see the engine, and how to check your make before you buy.
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Portable Tire Inflator PSI and CFM: Cars vs Trucks and RVs
Which portable inflator specs decide truck and RV capability: duty cycle at pressure, loaded CFM, battery clamps and auto shut-off, across six units.
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Jump Starter Peak Amps and Battery Capacity, by Vehicle Size
How peak amps, watt-hours, engine ratings and published cold floors sort eight jump starters between a full-size diesel truck and a compact car.
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OBD2 Code Reader or Bidirectional Scan Tool: What DIY Repair Needs
Which DIY jobs need a bidirectional scan tool and which a code reader finishes, compared across seven tools on actuator tests, resets and protocol support.
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Single or Dual Channel Dash Cam: What the Specs Decide
Front resolution, sensor model, aperture and rear-channel specifications compared across seven dash cams, and when a second camera is genuinely worth having.
Understanding the category
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Roof Box Capacity vs Your Vehicle's Roof Load Rating
Which number really limits your packing: a cargo box's rated capacity or your vehicle's roof load rating. Eight carriers compared on published specs.
