A cordless telephone set consists of a base station connected to a fixed telephone line [POTS] and a wireless handset which communicates with the mother set [Base set] with the help of radio waves. While the base station needs household mains electricity to work, the handset is powered by a battery which gets charged when the handset sits in its cradle on the base station.

Cordless Phone batteries are usually made using Nickel Cadmium [NiCad], Nickel Metal Hydride [NiMH] or Lithium Ion [Li- Ion] technologies. Each type of rechargeable battery technology has its own unique characteristics. Of these, batteries made from Nickel Metal Hydride offer higher energy densities than those made using NiCad's. http://www.dinodirect.com/ProductTags/Z.html In fact NiMH delivers approximately twice the capacity of its NiCad counterpart.

NiMH batteries are also less prone the dreaded malfunction of [Memory Effect] which significantly reduces the efficiency of NiCad batteries.

In recent times Li-Ion has become the emerging standard for portable power. Although efficiency wise it offers as much energy as NiMH but it weighs approximately 35% less. Of contemporary and significant relevance is the fact that NiMH and Li-Ion batteries do not contain heavy metals and toxic materials like Cadmium and Mercury and are thus environment friendly.

The best thing about batteries is that they can be replaced and there are scores of market players who offer the best deals at competitive rates. Cordless phones being very much part of our everyday lives, rely upon batteries to run as do most of the devices that make our life comfortable.

As cordless phone batteries are specially designed as per the brand and model being used, it is always judicious to keep track of these when looking for compatible batteries and ac adapter for one's cordless phone.