Definitions for "Battery type"
Most remotes use standard disposable alkaline AA or AAA batteries, however those that come with rechargeable batteries will use either NiCad (Nickel Cadmium) or NiMH (Nickel Metal Hydride). NiCad batteries are infamous for their "memory effect", which is a condition that reduces the battery's power storage capacity over time, while NiMH are for the most part immune. A newer battery type, LiIon (Lithium Ion), suffers from no memory effect and can hold more power in the same physical space, but has not been used in remote controls due to its prohibitively expensive cost. See also: batteries, rechargable.
The rechargeable internal battery in a CDMA mobile phone is usually one of three types: Nickel-cadmium, Nickel-metal hydride, or Lithium.
There are many different types of batteries used in MP3 players, ranging from AAs, Ds, and rechargeable batteries. You should know the battery type prior to purchase, as this can greatly affect the costs it takes to run your player.