tomd999
Platinum Member
Hiya,
Short battery life of newer battries is mainly caused by being undercharged for long periods and then having a high charging voltage.
The older lead plate, open cell style were very forgiving of a low charge states and high charging voltage and would still provide a resonable service life. The newer sealed AGM style are very unforgiving of either of these conditions and will have a very short life if they are subject to them.
In order to get long service life out of an AGM type you must make sure the charging system is maintaining correct charging voltage and amperage, not subjecting the battery to high rates that will cause the electrolyte to boil off. Since AGM battries contain very little electrolyte to begin with, even a small amount of boiloff will render the battery unuseable. AGM types used to be called "acid starved" because they contain such small amounts of acid. Since they are sealed, you can't add it back, your only solution is to replace the battery.
The best advice I can give for AGM owners is to measure the charging rates and purchase a battery tender that will maintain charge during long storage periods. If properly maintained, an AGM should give a 5 to 6 year service life.
Tom
Short battery life of newer battries is mainly caused by being undercharged for long periods and then having a high charging voltage.
The older lead plate, open cell style were very forgiving of a low charge states and high charging voltage and would still provide a resonable service life. The newer sealed AGM style are very unforgiving of either of these conditions and will have a very short life if they are subject to them.
In order to get long service life out of an AGM type you must make sure the charging system is maintaining correct charging voltage and amperage, not subjecting the battery to high rates that will cause the electrolyte to boil off. Since AGM battries contain very little electrolyte to begin with, even a small amount of boiloff will render the battery unuseable. AGM types used to be called "acid starved" because they contain such small amounts of acid. Since they are sealed, you can't add it back, your only solution is to replace the battery.
The best advice I can give for AGM owners is to measure the charging rates and purchase a battery tender that will maintain charge during long storage periods. If properly maintained, an AGM should give a 5 to 6 year service life.
Tom