These are some common sizes used for flashlights and electronic devices. They are described by the chemistry used in the battery. Single-use batteries are usually described as ''alkaline'' while rechargeable batteries may be ''Nickel-Cadmium'' (NiCad), ''Nickel Metal Hydride'' (NiMH), or Lithium Ion (Li-ion). | These are some common sizes used for flashlights and electronic devices. They are described by the chemistry used in the battery. Single-use batteries are usually described as ''alkaline'' while rechargeable batteries may be ''Nickel-Cadmium'' (NiCad), ''Nickel Metal Hydride'' (NiMH), or Lithium Ion (Li-ion). |