"I'd rather race without tires than without VX-6 in my battery"- Lee Petty. "The contents of a tube for a lifetime treatment of any fillable battery". "Brings sulphated mechanically-sound batteries back to life. Improves the electrical storage capacity of a battery. Gives recuperative and self-recharging ability". J.C. Whitney. (800) 837-4227. A (3) fld. oz. bottle will do a 6V or 12V. 1/3 of a bottle to each of the 3 cells for 6V. Or, 1/6 of a bottle to each of a 12V 6 cell openings. Do Not Overfill above the high mark on a clear battery. On black batteries, stop filling just after the plates are covered. (A reason why I like clear-view batteries). I used this on my 6V Chevy pickup battery that's sat out of the truck for the past 5 years which I haven't charged every month. Woulda' been dead by now, if not for for VX-6 (aka. "Charge-It") 3 oz. cycle size is #89XP0277Y Give the saleslady the italicsized four numbers 0277 because their catalog prefix and suffix numbers change. They have 1 qt. size #12DZ9084A, but the cycle size bottle is excellent to use with distilled water to top off the battery later on. You can't go wrong with VX-6 and a Battery Tender® trickle charger.