How to choose an e-bike, dash cam or car accessory

Most of the money in this category goes on two kinds of purchase: something that has to fit one exact car, and something with a large lithium-ion battery. Both are expensive to get wrong, and both are hard to return. This guide covers what to check before you pay, and the store policies table at the end shows how returns work at each brand.

E-bikes: check the class before the motor

In most US states an e-bike is legally a bicycle only if it fits one of three classes. Class 1 helps while you pedal up to 20 mph, Class 2 adds a throttle up to 20 mph, and Class 3 helps while you pedal up to 28 mph. States decide where each class may ride, and some limit Class 3 bikes on bike paths or set a minimum rider age. PeopleForBikes keeps a state-by-state summary of e-bike laws, and it is worth reading before you choose a bike with an "unlocked" or off-road mode.

Then compare what actually changes your ride:

• Battery capacity in watt-hours (Wh). Range claims assume a light rider on flat ground in the lowest assist level. Watt-hours let you compare bikes on the same terms: more Wh, more range.
• Weight. Fat-tire and cargo bikes from Himiway or Rad Power Bikes are stable but heavy; folding bikes from Lectric or Fiido are easier to carry up stairs or into a car.
• Brakes. Hydraulic disc brakes stop better than mechanical ones on a heavy bike at speed.
• Where service happens. Direct-to-consumer brands ship the bike to you. Ask who fixes it if something fails: a local partner shop, a mobile mechanic or you with parts by mail.

Battery safety is not optional

Many e-bike battery fires start while the battery is charging. The Consumer Product Safety Commission has urged makers to certify e-bikes to UL 2849 and other e-mobility devices to UL 2272, the safety standards for the whole electrical system. Before you buy:

• Look for UL 2849 (e-bikes) or UL 2272 (scooters, hoverboards) certification on the product page, not just "UL-listed cells".
• Search the brand and model in CPSC's recalls and product safety warnings. CPSC has issued warnings about specific e-bike batteries, including some sold with Rad Power Bikes models.
• Use only the charger and replacement batteries the brand sells for that bike, and charge where you can see it, away from exits.

Electric motorbikes and dirt bikes

Bikes such as 79BIKE, SUPER73 or the faster Riding'times models can go well beyond e-bike speeds. Many are sold for off-road use only. Read the product page for the class or "off-road" label, check whether your state requires registration, insurance or a motorcycle license for that speed, and budget for a helmet rated for motorcycle speeds rather than a bicycle helmet.

Dash cams, floor mats and exact-fit accessories

Brands like Fitcamx, TuxMat, Car Mats Customs, Jowua and Yeslak make parts for specific makes, models and years. Enter your exact trim before you order, because many brands treat custom-fit items as harder or costlier to return. For dash cams, compare:

• Front only, or front and rear. Rear and interior cameras cost more but matter for rear-end collisions and rideshare driving.
• Parking mode. Recording while parked usually needs a hardwire kit or a separate battery.
• Storage. Use a high-endurance microSD card; ordinary cards wear out under constant recording.
• Mounting. States limit what can be mounted on a windshield, so check your state's rules on placement.

Detailing products and jump starters

For detailing kits from Chemical Guys, Adam's Polishes or Obsessed Garage, compare price per ounce rather than kit price, and check whether coatings need a specific prep product you would have to buy too. Portable jump starters from GOOLOO and tire inflators from Fanttik carry lithium-ion batteries: the FAA's rules on lithium batteries apply if you plan to fly with one.

How to save in this category

Big-ticket mobility brands discount by model rather than with sitewide codes, so compare the bike or kit you want across the brand's own current offers on its GoSavify page. Ask whether accessories such as racks, fenders or a second battery are cheaper as a bundle at checkout than added later, and check whether the price includes shipping: freight charges on bikes and rooftop tents can add a lot to the total.