Hey there - new here to the golf cart forums, but a 36 year veteran ASE master tech. I just did the same thing on my Yamaha - installed a lithium battery on my old Yamaha - you'll need a 48V to 12V voltage reducer available on amazon. There are lots to choose from, you just need to choose one that will supply enough amperage for your 12v accessories - if you plan to run lights, stereo, USB ports, etc - make sure you get one that can handle the amperage. Also make sure you get and install an inline fuse to avoid major damage in the event of any problems in the future. Good Luck! - Loni