XS Power D3400 XS Series 12V 3,300 Amp AGM High Output Battery with M6 Terminal Bolt

Using a smart bass 3 and two AB xfl 12s. I read so much about how anything over 2k needed alternator upgrade, etc. But I gotta tell you.. I turn the volume up to clip, which on these subs is dang loud. And my voltage stays at 14.7. I thought my volt meter was broken. Then finally it began to dip super hard. To 14.4 lol. So I'm like wow, I think I can run all 4k of my power on stock electrical with just this one battery. Maybe if you run your system nonstop while driving, you will eventually run out of juice. But for me, I only play the music loud maybe a half hour at a time and the rest is probably pulling maybe 500w tops. Just at everyday listening volume. So for me, it's been awesome. It gives me the power when i feel the need for it, voltage stays strong and no dimming unless I really go crazy and even then it is only the trunk lights and dome lights, the headlights aren't really noticeable. This is on stock electrical so I'm even surprised that it does this well. Before this battery, no chance I was doing more. I was on 1200w and it was dimming like crazy. So not only am I on triple that power now, but the dimming is barely there. And the voltage appears to be extremely strong. This battery is really powerful. To hear the power from this setup and know most of it is coming directly from this battery is extremely impressive.

Great battery works the way I need it to. It fits where I need it and it’s reasonably priced. It is slightly heavy but that is to be expected

It works great

Works well so far; this high-quality AGM battery effectively powers my stereo system and provides reliable starting performance. The vehicle requires significantly more cranking amps than what I need for daily use, and the battery handles this with ease, maintaining excellent condition and durability.

Put 2 in my 08 Hummer H3 under the hood and both perform great under load, haven’t let me down yet!

Way over priced does not stay charged at all!!!! Tryed to get amazon to help get it warranties they would not do a thing. So i contacted xs power them selfs they told me i had to send it back at my own cost and they would see if it is bad and if it is they would then send me a new one witch would in effect leve me with car for a lest 1 full month total crap have had issues with it from bay one will stay charged for more than 1-2 days and i have nothing in my car after market at all just a worrible battery with horrible customer servacez DO NOT BUY ANY THING XS POWER EVER TRASH

This battery batteries so damn hard. Don't forget your accessory kits though, posts and side terminals are not included. Worth the cost!

Better than a Optima red top, but I did have one go bad don't know what happened to it, won't charge past 12.1v even with a regular charger at 40A.

Delivery was fast.I have 2 of them for my Sundown setup.They look and perform great.

Very Heavy and expensive customer service is basically non existant

Overpriced and fails just after warranty.