Suction power: often 5000 Pa up to 15,000 Pa or more; strong suction is key for lifting dirt, sand, pet hair, and crumbs from upholstery and floor mats. Higher suction is more effective but uses more battery.
Some models list suction in kPa; typical good portable vacs deliver 8–12 kPa for most car tasks.
Battery / Runtime
Battery capacity: common cordless car vacuums use ~2000–4000 mAh lithium-ion batteries.
Runtime per charge: usually 15–30+ minutes, depending on power setting.
Charging: many support USB-C fast charging.
Dust Collection
Dust bin capacity: typically 0.1 L up to ~0.5 L or more; larger bins mean fewer emptying stops but also bulkier units.
Filter: detachable and washable filters are common; some higher-end units use HEPA filtration for fine particles.
Physical
Weight: often lightweight (under 1 kg) for portability
Noise level: generally under ~75–85 dB, with quieter units being more pleasant to use.
Features
Cordless operation (battery powered) is typical for portability.
Multi-mode suction (low/medium/high) lets you balance power vs runtime.
Accessories often included: crevice tool for tight spaces, brush nozzle for upholstery.
Some models also serve as a blower to clear debris from hard-to-reach areas.