Protected, button top. Price includes storage case! (One case per battery pair, but odd numbers still receive a case) Batteries are sold individually.
Are you looking for a high-quality yet affordable 18650 battery? This is it. This battery features a high-quality Seiko protection circuit and quality Samsung cell inside. This battery is thin and short enough to fit in most lights.
Here is HKJ review of the unprotected cell.
Manufacturer Cell Specifications:
These cells, like all lithium and IMR cells, should not be discharged below 2.5 volts.