Batteries are the life blood of a SLR digital camera. A professional photographer takes a large number of photographs, and will be able to appreciate having a constant and reliable amount of power in his camera at all times. An unreliable supply could cost him a great photo.

The crv3 battery is a disposable, yet high capacity battery that is frequently used in numerous electronic appliances, and that also includes digital cameras. In shape and size it has the same dimensions of two double a (AA) batteries. The crv3 batteries are being used to replace the AA batteries that were originally placed in the electronic appliances, so the twin chambers of these appliances will accept either an AA battery or a crv3 battery.

At times the digital camera battery crv3 may be made with the lithium battery chemistry, but non-chargeable, and will carry a voltage of 3V (the equivalent of 2 AA alkaline batteries). Usually a crv3 battery lasts longer than AA batteries

Rechargeable crv3 batteries are also available on the market, and they carry a voltage of 3.7V. The following are good SLR camera battery choices.

The PX28 is mostly utilized in digital cameras. It is available in both alkaline and in lithium.

The battery by Duracell, the 1/3 N Lithium 3V, is also known as DL1/3N, the 2L76, and the CR1/3N.

Another by Duracell is the 28L Lithium 6V. There are a few that are quite like this one and are the Sanyo PX28 Lithium, and the 2CR 1/3N, and Energizer PX28L and L544. These are used both in digital cameras and also in dog collars.

The model by Energizer is 2L76 Lithium with 3V. This is not always available, but it is very much the same as the Duracell 1/3N, and can be switched out for than battery.

Another battery by Energizer is the AA Lithium 1.5 V. The battery has the power to last 500% longer that the regular alkaline battery inside the digital SLR camera. In cold temperature is works well, so if shooting in Alaska's interior, the batteries will serve you very well. They are also used in portable GPS navigation systems