Lead-acid batteries are and will still be widely used to power various electrical systems. Unfortunately, these are found for most of the time at rest and by the time they are called to work, they could be out of order, creating real problems for critical infrastructures. The work aims to lead to the construction of a test system for verifying the performance and life of UPS batteries starting from the analysis of different batteries with equivalent characteristics. The first step serves to determine a standardization of the work and of the system to obtain a useful reference for the comparison and repetition of subsequent tests.