Custom Aluminum Alloy Battery Pack Case Zero-weld design aluminum alloy battery pack case customization for portable lithium electric parts. Available in various configurations for LiFePO4 & Lithium Ion batteries (48V/60V/72V, 20Ah-100Ah). Product Overview Our custom battery pack cases feature one-piece stretch forming (0 welds) for superior structural integrity, mirror-smooth surfaces, and tight water/dust-proof sealing that extends battery service life by 30%. Available in