Hey anglers, if you're running a Vexilar FLX-28 Pro Pack II fish finder, these Mighty Max batteries are exactly what you need to keep fishing all day long! This pack comes with two 12V 9Ah sealed lead acid batteries that are maintenance-free and UL certified for safety. The dimensions are perfect at 5.94 x 2.56 x 4.02 inches with F2 terminals, so they fit right into your setup. What's great about SLA/AGM batteries is they're spill-proof and can handle high discharge rates, which is exactly what you need for your fish finder. They work great in all sorts of temperatures too - from freezing cold ice fishing trips to hot summer days on the lake. You can mount these babies in any position without worrying about leaks, and they're built to resist shocks and vibrations from being in your boat or ATV. Each battery packs enough power to keep your flasher running strong, and having two means you always have a backup ready to go. They're rechargeable, of course, and come with a full one-year warranty for peace of mind. The build quality feels solid - these aren't some cheap batteries that'll die after a few uses. Just remember, you'll need to provide your own wire harness or mounting accessories. For the price, getting two quality batteries that are specifically compatible with your Vexilar gear is honestly a steal!