Is a cordless carpet cleaner worth it over a corded one?

For spills, stairs and car seats, yes: no cord to drag and no outlet needed. For whole rooms, a corded extractor with a larger tank does more per session for less money.

How long does the battery last per charge?

Runtime depends on the cleaning mode and load, so expect shorter sessions than a corded machine allows. Plan on cleaning one area at a time and recharging between jobs.

What surfaces can it clean?

It is recommended for carpet and rugs. It is not intended for hard floors or upholstery unless the maker lists those surfaces.

What comes in the box?

The listing does not detail included accessories. Confirm the attachments and charger with the store before buying.

How does it compare with corded spot cleaners?

Corded spot cleaners run without a charge limit and usually hold more solution, so they finish bigger jobs in one pass. The 100C gives up runtime and tank size for portability.