Your choice of batteries for powering musical equipment should not be determined solely by the size of battery which fits into the appliance. It is also worth considering the drain which it makes on the power supply and the amount of use which you give it.

If you are going to be using your portable music player to get you through a long bus or plane journey then you don’t want to be running out of power in the middle of the night. Choosing the best quality batteries which you can afford is the best idea, and having a couple of spare ones in your pocket or bag is also worth considering. On the other hand, if you mainly listen to music in your house or for short periods, then rechargeable batteries will probably be a more economic as well as environmentally friendly solution.

Apart from that you could look at choosing the most appropriate from the following list:

Procell. This is a good solid choice. Regardless of whether you need AAA for an mp3 player, AA for a portable cd player or one of the bigger batteries which some radios demand you will find this to be a reliable power supply and a very reasonable price.

Duracell Plus. These are a bit more expensive than the Procell but you can expect them to last a big longer. This battery is possibly a better option if you have an appliance which you know places a high drain on the power supply and prefer to pay a little more in order to enjoy more uninterrupted music.

Duracell Ultra. Even better quality and even more long lasting, these industry leading batteries also come with a power supply indicator to let know how long is left on them.

Energizer Industrial. These are extremely popular batteries with people who are heavy users and who like to buy in bulk at a great price without compromising the quality. Because you buy them in large amounts the reduced amount of packaging which they come with also makes them a good choice for environmentally aware users.

Rechargeable batteries. If you are going to have regular access to a recharger  this could be a good option, although if you are making a long journey you might want to take some back up disposable units as well just in case you run out before reaching your destination.