For occasional use it doesn't hold it's charge very well. I've got it on a boat and we only get out a couple times a month. The charge falls between uses every time. Once the alternator has charged it back up it's fine, and it only powers the radio so that's okay. I wish it held its charge better though...

I had a cap-cell from SE that I had to replace with this since it burned out after a week of use. First off, I have enough packaging peanuts to last a lifetime now since the battery was buried in a box about 100 times it's size. Definitely better than finding a lead & acid surprise. The machine screws sent with the battery weren't long enough to accommodate my Monster ring terminals, but 50¢ at the hardware store fixed that. As with the cap-cell, I have no headlight dimming. Finally, the thing that really matters, SPL. Since the only difference in my system is the loss of the "600 W Cap-Cell", exchanging it for this "20 AH Power Cell". To be honest, despite the cap-cell having to work when the subs were brand new and not broken in, my system had more pop with the cap-cell. Maybe adding a capacitor will help.

Its ok for a cheaper battery, performs more like my powersonic battery than my kinetik hc600.

I'ts now been 6 months since I installed my pair of these batteries, and one is failing already. I'm not sure if I'd recommend them anymore.

I bought this battery to run my 100w RMS amp and it definitely did not do what I thought it would. It only had enough power for my sub to hit the high bass notes. I'd only recommend it if you were running a small amp for your door speakers or something.