Trojan 105 VS Interstate

[Winston Noel]

Needing to buy some new batteries, I have two questions.
Trojan VS Interstate?
Also, when buying a set of batteries, is there anywhere that I can buy the batteries from that it is significantly cheaper or is a set of 6 a pretty standard price?

[scottyb]

There is a significant difference in capacity and price amongst brands and models. Capacity is the most important thing to consider.

[JohnnieB]

In general terms, there is more difference between the grades within the same brand than there is between the same grade in different brands.

Some brands have five grades (Amp-Hour ratings) while others have only two, so be careful to select the same grade when doing price comparisons.

Basically, select the highest Amp-Hour rating you budget can tolerate and buy that grade in the brand that has the best price (including shipping/delivery) in your area.

Here is a list of the grades within various brands that I put together when I was looking for batteries last year.
I ended up getting a relatively good price on Exide GC-145 batteries through a tractor supply store, even though they had to be specially ordered.