dual battery help

2 of the same kind is better, but just add the extra battery and run + to+ and - to -

k. thanks. i was just wondering because i read somewhere that 2 different batterys would draw off each other an drain each other out

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they can .just wanna have the voltage as close to each other as possible

many people run two different types of batteries. if it doesn't happen what will happen is the battereis will go dead after some time. you can alwasy buy 1 battery, try it, and if this does happen then buy a new one up front too.

Any person good with batteries will tell you not to use non-matching batteries, as one may hurt or constantly drain the other, or affect the resting voltage. I've done mismatched before and it worked out alright, but it is a general rule to be followed to use the same brand/model/make/size. In order to wire them in parallel simply connect the + on one to the + on the other. The - can be done 2 ways, 1 is to connect it to the other -, the other is to simply ground it to the chassis like the other one.

youtube has some good videos for installing multiple batteries as well fyi

I'm thinking about throwing a second battery in my trunk to begin my new build. Instead of running a decent battery with the POS I have under the hood, I'm gonna try to buy two decent ones. I saw an ad that I could pick up a Shiruken BT45 and a Shiruken BT20. Are these decent batteries to run? Would they be okay together, or would their size difference create some issues?