Well, it looks like the two Interstates are cooked. I'm considering upgrading to AGMs.Looking at some of the pricing, like the EXIDE brand is scary, but OPTIMA lists a nice 750CCA batter for only about 175.00Any experience or advice?thanks

$ for $ they'll outlast flooded cells. I just replaced a 7 y.o. AGM battery in my TT. Unfortunately it was a large 4D and the replacement was super expensive so I went with a flooded cell replacement. The Optima has good press so they should work well. Two caveats would be: 1. make certain that your converter/charger will work OK with the AGM. If it's only a few years old, it's probably a 3 stage and will be fine. If it's from the 90s it could be a 2 stage and will be an issue. 2. The AGMs are taller than their flooded cell cousins. Be certain they will fit. When I had my Lance 981 I wanted to go to AGM but they wouldn't fit in the compartment.

Optima batteries are vibration resistant, but are relatively low output. I use them because I drive gravel roads. Standard batteries would only last 18 months.

Very low internal discharge rate in AGMs which is an advantage if you store for any length of time. I had one in a race car that sat untouched for 2 years plus and then fired right up when I had to move it.

I bought 2 AGM's from Cabelas.click hereThey are on sale right now for $153.99The box it comes in shows Universial Battery UB12900

gitpicker2009 wrote:Well, it looks like the two Interstates are cooked. I'm considering upgrading to AGMs.Looking at some of the pricing, like the EXIDE brand is scary, but OPTIMA lists a nice 750CCA batter for only about 175.00Any experience or advice?thanksOptima batteries would NOT be my choice for an RV . They are good batteries for some purposes, but far from what would be best for an RV ... assuming we're speaking of a motor home. A 750CCA rating is meaningless for RV use.....CCA is cold cranking amps...for engine starting. You want to look at Amp-Hour ratings....and Optima batteries are pretty measly. If you must go with a cheap Optima AGM, at last get the Blue Top as that is more deep cycle than the Yellow or Red top. ... but it only has a 50AH rating. Your Interstate batteries probably had at least a 216AH rating....more than double what two Blue Top Optima batteries would provide. Get what your budget can handle, but be prepared for less run time on all your RV equipment if you get Optima. For just a few dollars more you could get a real AGM RV battery: Sams Club AGM for RV

AGM battery advice | Good Sam Community

Downwindtracke1
Explorer
Nov 07, 2015
Optima batteries are vibration resistant, but are relatively low output. I use them because I drive gravel roads. Standard batteries would only last 18 months.
jmcgsd
Explorer
Nov 07, 2015
$ for $ they'll outlast flooded cells. I just replaced a 7 y.o. AGM battery in my TT. Unfortunately it was a large 4D and the replacement was super expensive so I went with a flooded cell replacement.

The Optima has good press so they should work well.

Two caveats would be: 1. make certain that your converter/charger will work OK with the AGM. If it's only a few years old, it's probably a 3 stage and will be fine. If it's from the 90s it could be a 2 stage and will be an issue. 2. The AGMs are taller than their flooded cell cousins. Be certain they will fit. When I had my Lance 981 I wanted to go to AGM but they wouldn't fit in the compartment.

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