Lithium batteries.
Lithium batteries are more expensive than dry cells. For example, a set of dry batteries on the market now costs 400-500 yuan, while lithium batteries with the same energy generally cost more than 1,000 yuan, so the price of lithium batteries is generally twice or more than that of dry batteries.
Lithium batteries also have a fast charging function and a long lifespan. Dry batteries are polluting and are disposable batteries.