Easy to maintain
The UB-12900 by UPG is a 12 volt, valve regulated, absorbent glass mat battery. Absorbent glass mat (AGM) batteries offer a few key advantages over flooded lead acid batteries, including: spill-proof performance in any position, better performance in high-power applications, and no need to maintain the water level.

Like all batteries, the lifespan depends on how well they are managed. The number of cycles a battery can handle depends on how much of the total capacity is discharged before being charged again. The UB-12900 batteries should not be discharged completely and should be recharged fully between cycles.