UNISEG's Battery Transport & Storage (BTS) Container was specifically designed for the safe, environmentally sustainable and efficient storage and transportation of used car batteries and other lead acid batteries. The BTS Container eliminates many of the short comings of the current methods used to store and. The figure below shows UNISEG's BTS Container in the front load configuration and its features that make it ideal as a used car battery storage container and lead acid battery container; Note:. The figure below shows UNISEG's Battery Transport & Storage Container, closed and ready for the immediate, safe & secure transport of your used car batteries and other lead acid. The major benefits of the BTS Container for the storage and transportation of used lead acid batteries (ULAB), include; 1. Eliminates Double and Manual Handling of Used Batteries The BTS Container is designed for used lead acid batteries to be collected from the “coal face”, the Used Battery Generators, and be delivered directly to the Battery.