Exell L28PX 6V Lithium Battery Replaces K28L V28PXL 2CR1/3N Exell Batteries not only provide consumers with high efficiency, long-lasting performance, they also function as replacement batteries for an array of common and unique applications.L28PX 6V Lithium Battery Replaces K28L V28PXL 2CR1/3N Ranging from vintage camera equipment to sophisticated medical testing equipment, Exell Batteries can meet the needs of all consumers.Exell Battery is one of the few product lines Proudly Assembled in the USA. This battery is a mercury free alternative to the now banned mercuric oxide cell PX 28.