The radio has been an indispensable part of human life ever since it was invented and FM transmitters are a portable device that can be attached to a portable media player, CD player or satellite radio system. There is a frequency adjustment knob provided with the FM transmitter which allows the user to tune in to a particular radio station. The main purpose of the FM transmitter is to play music through a car stereo or any radio, for that matter.
The disadvantage of FM transmitters is that they tend to have very short ranges, typically up to 9 meters. Outside this range, the signal is very weak and this translates into inferior sound quality from the speakers. Once a threshold distance has been exceeded, the transmitter stops receiving signals altogether.
The FM frequency range varies from 76 MHz to 108 MHz. Some range of frequency bands may be allocated to the government for broadcasting important information like election results or Presidential address. There are some disadvantages of using FM transmitters like sometimes the sound quality may be affected due to cluttering of radio signals. This is a more likely scenario in urban areas than anywhere else. Yet another disadvantage is the absence of a volume control mechanism in some of the devices.
FM transmitters normally make use of batteries but there are some that extract power from the device to which they are attached. For example, in a car stereo system, the USB FM transmitter draws power from the car battery.

NIMH batteries are USED extensively in today’s world. You need them at every point of time to make your gadgets work. Many people think that a particular type of battery can be used for particular thing only. The batteries available are multipurpose and can be used for making various appliances. NIMH batteries are also somewhat similar. They are used for so many appliances that accounts for their popularity in the electronic world. Here we illustrate different uses of NIMH rechargeable batteries.  

They are mostly used in those devices which are hand held. Names of few such devices are digital cameras, mp3 players, laptops etc. The NIMH rechargeable batteries are of great advantage when they are employed in use for the high drain devices. There are some Gadgets which need batteries to be replaced from time to time. Examples of such gadgets are the toys or video game controllers or the digital cameras. For this category of gadgets NIMH batteries are again so very useful.  

To make sure that you get the best battery for your device always check the quality of NIMH battery before buying it. You will find that many sellers sell the batteries at cheaper rates than authorized dealers but there quality is not good. You may lose more money by buying these cheap batteries as they may harm your expensive gadgets. It is advisable that you get the best quality NIMH battery for keeping your gadgets safe.