Although Oklahoma point-of-sale notices do not require specific language, notices must be posted at or near the point of display or sale to inform the public that lead-acid batteries are accepted for recycling. The Oklahoma point-of-sale notices must be posted by September 1, 1993, and printed by battery retailers. For purposes of this law a “lead-acid battery” means a lead-acid electrical device used in boats, planes and motor vehicles.
There's a lot of room for growth in ... lead battery chemistry ... it's something that would really make it even more competitive for things like stationary storage.