Button cell

From orig
Jump to navigationJump to search

Button cell[edit | edit source]

usually a single cell, lithium or silver-oxide based battery. The larger lithum-based cells are also known as "coin-cells" (they have a simliar size).

Scope of application[edit | edit source]

Lithuim based[edit | edit source]

This type provides 3 volts.
Modern quartz watches, calculators and small pda devices are commonly powered by this type.

rechargeable[edit | edit source]

This type is not widespread, sometimes three (larger) button cells are connected in series.
Rechargeable Button cells do not have good capacity performance.
Suitable chargers are not commonly available.

other chemical composition[edit | edit source]

  • Mercury cells are now banned from sale in many countries.
  • Alkali cells are sometimes found in low-end markets, but do only provide a fraction of capacity.
  • Silver-oxide cells are not toxic, and have replaced mercury based cells.
  • Zinc-oxide cells are utilizing air (it is required to remove a plastic foil layer before usage).

other types[edit | edit source]

9 volt batteries commonly contain "tablets" in button cell style, or an array of six tiny button cells.
For this reason the alkali versions are remarkable expensive.
Some special 12 volts batteries (remote controls) are also composed of tiny button cells. Template:Energy-stub