Lantern batteries are rectangular, typically an alkaline or zinc-carbon primary battery, heavily used in flashlights and/or lanterns. They comprise multiple cells inside a housing.
Lantern batteries are physically larger and consequently offer higher capacity than the more common torch batteries. The most common variant in the US is the 6 volt square-base battery with spring terminals. In Europe the most common is the 4.5 volt flat-pack types.
The 6-volt variety typically has spring or screw terminals. Different types have different internal construction; the same package size may be made up with "D" size or "F" size cells, giving different capacity. A rechargeable version, comprising a three-cell sealed lead-acid battery with a lower capacity than primary versions, has also been placed in the market. The 12-volt version has screw terminals and a rectangular base. Since it is 12-volt, this type can be used to power car accessories outside of an automobile, using extra wiring or an adapter.
Lantern batteries are focused toward everyday consumers yet are "specially priced" for bulk orders. If you are a large volume commercial or government user, contact BatteriesInAFlash.com for special pricing and offers.