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Old 07-20-2010, 05:31 PM   #1
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Default Ultimate light-weight battery.

I've been scoping out various battery options for my Miata for awhile now and think I came up with the best AH/weight/cost option.

Check out the link below. 12V, 21AH, sealed lead-acid (AGM), 13/14lbs., $40. Bonus is it actually copes very well with sitting while not in use, so use a quick disconnect and possibly a battery tender for long storage periods and be good to go.

http://www.portablepower.com/powerso...80nb-p-64.html

*flag to post adapters are available everywhere for dirt cheap, or just bolt your leads to the battery.
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Old 07-20-2010, 05:43 PM   #2
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Use a quick disconnect regardless if the car sits for more than a week or two. The ECU, alarm, radio, ect. continue to draw a small amount of current that will drain a smaller battery such as this fairly quick.
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Old 07-21-2010, 01:59 PM   #3
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why not stick with an oddysey?

i think i use a larger battery in my UPS at the office. :-)
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Old 07-21-2010, 02:26 PM   #4
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Oddysey's are pretty expensive by comparison, and the Powersonic *should* be very comparable to one. I'll pick one up and let everyone know how it works out.

I'll test how long it can sit in the car w/o a disconnect, how well it cranks compared to stock, ect. ect.
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Old 07-21-2010, 02:29 PM   #5
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I'm always looking for the best price to performance options. Most of us are cheap when it comes to our Miatas, and there's nothing wrong with that. It's the quest to get a car that costs barely anything to destroy much more expensive things on the road =). I wanna do it as cheap as possible with parts that are proven and not overkill/expensive.
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Old 07-21-2010, 02:32 PM   #6
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I found installing a thicker gauge of power wire from the battery to the starter made a HUGE difference in starting power. The 5.3 in the car now starts faster then the stock engine did with the stock wiring. This is all with a 6 year old OEM battery.
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