I recently purchased a 03 TT. The batteries are toast. I am thinking NAPA batteries because there close. However, I am not set and would appreciate any opinions on subject. Of course I want it to last. Seems battery quality veries quite abit. Thanks for any input.

 

Looking for a deep-cycle battery?

I think Optima's are the best for quality, price & performance... they're the only ones that last in our service trucks & tractors.

 

If you have two batteries, I'd replace them with 6v golf cart/electric vehicle batteries in series.

Word is they are built to discharge deeper w/o reducing their life span, and that you get generally better performance for the money.

 

I have been running a Wally World deep cycle battery for almost 4 yrs now. Just be sure to keep an eye on the water level, as mine seems to drop now and then.

 

Two Trojan T105 (could use T125) 6 volt batteries. You achieve nearly twice the amp/hrs as two 12 volt. Going to Glamis in the winter the heater will run nearly all night and the batteries never get low.

 

This is what I would do also. Otherwise, I have had good luck with an Interstate deep cycle.

 

No question about the 6v deep cycle golf cart style battery. It will take many more deep discharges without damage than the supposed deep cycle Marine/Rv batteries commonly purchased. The next thing is look closely at your converter. One of the best investments you can make is get a multiple charge converter called a "smart charger". It will not boil the water out of your batteries and damage them when plugged in for a long period of time. You will pay for it with the first set of batteries you save. All the experts say the biggest bang for the buck is lead acid 6v'ers.
Bob

 

I also use 2 - 6 Volt Trojans. I love them!

 

Big thumbs up for the 6volts!!!

 

I'm ready for a set of 6 volt bats too. Where is the best place to ge them?

Wetspirit

 

I found my best buy on Trojans at a smaller battery, generator repair center. He was $9 cheaper per battery on T-105's. Call around for prices on a certain battery, like the Trojan T105 - - you will quickly find who will deal.

Bob

 

Sam's Club has 6 volt golf cart batteries for 45 or 50 bucks, each, last time I checked.

You may have to get taller battery boxes to hold them.

 

I agree that the golf cart six volts are the best the original twelve volt deep cycle batteries that I had froze when my propane detector decided to go off in December when the trailer was new. I went to a internet site and some guy was raving about Optima yellow batteries and I bought two at COSTCO
The Optima batteries were very disappointing to say the least. After a year or so of not being impressed I bought the smaller Trojans (the higher ones are to high for my slideout battery tray.) The Trojans are twice as good as the Optimas and I imagine the larger Trojans are better yet. The Optimas are a good battery for a Jeep with a winch or some such application but not for a RV.
Just my opinion
Jim O

 

Not here to bash Optima , but I fully feel your pain Jim.

Your not alone on this one. Just say to Yellow Tops.

On the other hand I love my Red Tops in the truck. Go figure

 

Try the Optima BLUE TOP marine batteries - withstands physical abuse, made to deep-cycle, and low self-discharge rate... we use them in our service trucks with 5KW inverters running all day with engine off - works great!