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Old 06-04-2013, 09:45 AM   #1 (permalink)
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Default Which Optima Deep Cycle?

I want to purchase one for now, and maybe get a 2nd at some point.

I what to charge a 14s 4400 battery (2x 7s 4400) with my PL8.

It needs a handle or case with a handle since I will be storing in the basement.

Also please give me any feedback on how many charges I should get with the battery you recommend.

THANKS!!!!!!
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Old 06-04-2013, 01:09 PM   #2 (permalink)
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Most do not have a case, some have handles. If the one you want does not, almost any marine store will have battery trays and/or battery boxes to store the battery and all battery boxes have straps for handles.
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Old 06-04-2013, 03:03 PM   #3 (permalink)
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Quote:
Originally Posted by NickBee View Post
I want to purchase one for now, and maybe get a 2nd at some point.

I what to charge a 14s 4400 battery (2x 7s 4400) with my PL8.

It needs a handle or case with a handle since I will be storing in the basement.

Also please give me any feedback on how many charges I should get with the battery you recommend.

THANKS!!!!!!
I don't think optima makes a true deep cycle battery. It looks like they have a marine starting battery, but you want a real deep cycle if you're going to be field charging.
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Old 06-04-2013, 03:05 PM   #4 (permalink)
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you want a real deep cycle if you're going to be field charging.
Do you have an example? All the stores I've checked out only carry marine deep cycle batteries. Except one place that also carried 6v golf cart batteries. They were huge, expensive and you need two of them for 12v. Not practical or cost effective for field charging.
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Old 06-04-2013, 03:10 PM   #5 (permalink)
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Do you have an example? All the stores I've checked out only carry marine deep cycle batteries. Except one place that also carried 6v golf cart batteries. They were huge, expensive and you need two of them for 12v. Not practical or cost effective for field charging.
Take a look at this thread

https://www.helifreak.com/showthread.php?t=374446

It helped me out a lot.

I ended up getting a CostCo deep cycle battery but it had a lower capacity (about 80 amp-hours) because I was originally just charging 2300 mAh 6S lipos. I recently got a 550 and now need to charge 4500 mAh 6S lipos and I wish I had gotten a bigger one.

There's a picture of the one I got in post #97 on the thread I listed.

Don't forget with a deep cycle, you lose efficiency the faster you charge, so if you're going to be doing 3c or 4c charges you may want to get a larger one.
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Old 06-04-2013, 03:42 PM   #6 (permalink)
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The Costco batteries are marine batteries. At least the ones at my Costco are all marine batteries. Optima is an AGM battery which can support deeper discharge than traditional Pb batteries. But they are expensive. In the Optima line, the Blue top is the marine, deep cycle variant.
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Old 06-05-2013, 04:08 PM   #7 (permalink)
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FYI guys the Sears Diehard Platinum batteries are rebadged Odyssey batteries, which are far superior to optimas. And they have great warranty support.
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Old 06-05-2013, 04:44 PM   #8 (permalink)
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Just put one of those in my car. So far quite good. Now the sub no longer causes the dash lights to dim They are expensive and you need two for 24v. Factor in service life and you are already into generator territory. Can't beat the setup for lack of noise and lack of extension cords etc.
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Old 06-05-2013, 07:24 PM   #9 (permalink)
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I stopped at a battery plus on the way home from work. They carry a 80ah true deep cycle agm from werker. $180 with their 10% off coupon.

I know two of these will be expensive but it almost works out to the price of buying another 14s 4400. Asuming I use the Lipo to about 80/20 how many cycles do you think I could get from two of these in serise (24v). I would want to charge at 2c which pulls about 25A at 24v with my power supply.

thanks.

Ps. A generator is not an option for me as I don't have a garage to store it.
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Old 06-05-2013, 08:15 PM   #10 (permalink)
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Nice. They will probably last 2X as long as my $80 lead/acid deep cycles so you are golden!
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Old 06-24-2013, 09:44 AM   #11 (permalink)
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Werker Batts are Werking well!!!!
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mCP X bl...Nano QX...Futaba 8FG
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Old 06-30-2013, 09:06 PM   #12 (permalink)
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NickBee- I think you should use some proper insulated terminal clamps to prevent an accidental short. In the picture you have 24v at about 900 amps about an inch apart, if a metal tool rolled off that table you would be lucky to get away unharmed.
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Old 06-30-2013, 09:30 PM   #13 (permalink)
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Quote:
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NickBee- I think you should use some proper insulated terminal clamps to prevent an accidental short. In the picture you have 24v at about 900 amps about an inch apart, if a metal tool rolled off that table you would be lucky to get away unharmed.
Good suggestion. Can you provide a link?

Thanks
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Protos 500 Stretched
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mCP X bl...Nano QX...Futaba 8FG
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Old 06-30-2013, 11:18 PM   #14 (permalink)
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Something like you'd buy at autozone that is secure, then make or find a rubber boot to cover the positive parts. Sorry no specific link. If you are game to hit a junkyard late model Fords have a nice rubber boot on the hot battery terminal.
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