Battery choice for 2002 supra ssv

[jmcmaster1976]

Hi,

I have one new d34m optima battery. I planned on purchasing another battery to run a dual battery setup. Could someone tell me if I'm ok with another D34M or should I go with the bigger D31m? Before anyone suggests why I'm using optima brand batteries I'll save you the trouble and say I can't get a good deal on them. Any help would be great.

Thanks

[wotan2525]

Hi,

I have one new d34m optima battery. I planned on purchasing another battery to run a dual battery setup. Could someone tell me if I'm ok with another D34M or should I go with the bigger D31m? Before anyone suggests why I'm using optima brand batteries I'll save you the trouble and say I can't get a good deal on them. Any help would be great.

Thanks

I assume you mean that you can get a good deal on an optima? Either way -- it's your money, so spend it however you like. I'd go for the biggest battery I could find space for. I run (2) of the 31s for my house/stereo bank.

[Wylietunes]

Without knowing anything else other than you currently have a 34M, id say go with the larger D31M for a dual bank setup. If you are going to be wiring them together in parallel, then go with a 2nd D34M.

[jmcmaster1976]

Thanks guys. That should of been I "can" get deals on the optima batteries. They will be in ran parallel.

[jmcmaster1976]

One last question. I will be running these batteries in parallel. Do I have to run 2 34m's in parallel or can I run 1 d34m and 1 d31m? will it hurt anything if the batteries are not the same?

[Wylietunes]

Ideally, you need to have 2 identical batteries when two or more will be wired together, as they become one. Its also best if they are the same age as well. A larger and smaller battery wired together will not recharge at the same rate, nor discharge at the same rate. I would go with another 34M if wiring them in parallel is the plan.

[jmcmaster1976]

Even if I'm using a switch? Ultimately I wanted a 31m for the other battery but your saying get identical batteries?

[Wylietunes]

You said they would be wired in parallel, right? Using a dual bank switch gives you 2 battery banks. 2 batteries wired together in parallel gives you one large battery.

[jmcmaster1976]

I apologize Mike. I got my electrical terms screwed up. I think I will go with a guest dual battery switch. I'm ok going with the 31m and 34m with switch?

[Wylietunes]

Ok cool! Yes, go with the larger 31M and use it as the house bank and use the existing 34M as the main cranking.