6-volt The 6-volt variety typically has spring or screw terminals. Using various internal construction styles, the same package size may be made up with "
D" size or "F" size cells, offering various capacities. A rechargeable version, comprising a three-cell
sealed lead-acid battery with a lower capacity than
primary versions, has also been marketed. They are also used in the
construction industry for powering
flashing lights at roadworks.
4.5-volt More common in Europe and Russia, the 4.5-volt variety is a smaller, flat-pack battery mostly used in flashlights. It uses two metal strips as terminals. The shorter strip is the positive (+) terminal. This variety may be marked as 3R12, 3336, KBS (Russian
КБС), 3,7-FMC-0,50 (Russian
3,7-ФМЦ-0,50), or others.
7.5-volt The 7.5-volt version has screw terminals and a rectangular base. A carrying handle is usually connected between the terminals.
12-volt 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. ==Specifications and designations==