Battery testing can comprise of various methods. Load testing a battery is a true way to prove the actual capacity as well as the integrity of the entire system. However the disadvantage of battery testing in this way is that discharging the battery actually reduces its life span and once the battery is discharged it then remains unable to protect the load until it has recharged. Even with this major disadvantage load testing shortly after installation of a new battery and again as the battery reaches around 60% of its life span, is recommended to confirm that the expected capacity is still correct. As long as the battery is maintained properly and internal resistance monitored, there is normally no need for excessive load testing beyond this.