Battery Module for A4-8 MKII, D6-8 MKII and A6-55 - Lithium Iron Phosphate LifePO4 batteries with Aluminum enclosure Sale! from 12900 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Battery Module for A4-8 MKII, D6-8 MKII and A6-55. This includes the 2 batteries with aluminum enclosure. - Lithium Iron Phosphate LifePO4 batteries. CALIFORNIA PROPOSITION 65 WARNING WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.