Need reliable battery power? This Mighty Max 2-pack has you covered with their ML1.3-6 sealed lead acid batteries. These are 6V 1.3AH maintenance-free rechargeable batteries that work as direct replacements for Universal Battery ub613k models, and they're even UL certified for safety. The dimensions are 3.82 x 0.98 x 2.24 inches with F1 terminals (just note that wire harness and mounting accessories aren't included). What's great about SLA/AGM batteries like these is they're spill-proof, have high discharge rates, work in wide temperature ranges, and offer long service life. You can mount them in any position, and they resist shocks and vibration really well while maintaining performance in both high and low temperatures. These are perfect for various applications where you need dependable backup power. Mighty Max backs them with a full one-year warranty, so you can buy with confidence. Whether you're replacing old batteries in existing equipment or setting up new systems, these provide the reliable power you need without the maintenance hassles of traditional batteries. Just make sure they're the right fit for your specific application!