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We tested a used factory second Deka, A new Duracell (re-branded deka) XSpower xp3000 and a xspower d3100. They are all group 31 batteries. This test is with a cheap Harbor Freight 500 amp load tester that we added cooling fans to. Out side air was at about 90, The tester was allowed to cool down for about 10 min before the next test. DATA, all 30 sec loads Used Deka 2nd Internet $40 bucks Rest 12.75 volts peak amps 450 after 30 sec 380 amps dropped to 10.50 volts after test 12.47 volts Duracell Group 31 Sams club $160 without core Rest 12.70 volts Peak amps 476 after 30 sec 367 amps dropped to 10.6 volts after test 12.49 volts XSpower Xp3000 Internet group buy $289, used for 4 months Rest 12.95 volts Peak amps 475 after 30 sec 380 amps dropped to 10.66 volts after test 12.85 volts XSpower D3100 NEW in box, internet $370 Rest 12.97 volts peak amps 481 after 30 sec 378 amps dropped to 10.90 volts after test 12.68 volts The Deka and the Duracell are right on par with each other and are a good price. The xp3000 seems to have a large reserve as the voltage came back strong. But the pad size is so small we had a really hard time to getting a good connection. THe D3100 is the only battery that had the drop voltage go up during testing, as the amp load was dropping during the test the voltage was climbing into the 11's. For more on this Go to http://www.floridaspl.com/forums/showthread.php?t=23311 We are going to do a 300 amp load for 1 minute 30 seconds. We are getting more batteries to test as well. BTW don't waste money on the XP series Get the D series. The d3100 is a beast.

Even on the limited amount of money I've been able to spend on audio, I've always found a way to get the amps I've dreamed of. But I'd like like to have a US amps VLX400. The surfboard amp (in purple lol), that is one amp I'd love to have my fingers on! Next dream amp on the list is a Cactus Sound K9, and I'll most likely have one eventually. Oh yeah, and anything Audison. I look at their amps at least once a week, maybe someday... I see a lot of people wanting a Soundstream Class A 10.0, I think that's funny because I had one and could not sell the damn thing to save my life. Ended up trading it to Forevrbumpn for softparts and HIDs.