12V Lithium Ion Battery9.6 AH LI lightweight and powerful. This 12 Volt 9 amp-hour Vexilar Lithium battery has been designed to replace any current Vexilar Flasher/Pack battery and still allow use of the 1amp fully-automatic Vexilar battery charger. Drop in replacement for any current Vexilar Flasher/Pack Battery LiFePO4 technology Delivers twice the number of battery re-charging cycles over sealed lead-acid batteries 2.75 lbs (Half the weight of the Vexilar SLA battery).