best practices for long battery life
I cannot get more than 3 years out of my battery on my TT. Original battery was an interstate. It was replaced under warranty going into its third year. The replacement lasted two years. I then trie...
Forum Discussion
Trojans' 14.82 spec was likely arrived at as thay is what they expect would be able to achieve the highest state of charge in the average time to recharge in the average use that they expect their battery to be used in and thus reduce the possibility of warranty returns
Its not as if 14.4v cannot fully charge it, it just takes longer. Perhaps when older with a few hundred cycles 14.4v cannot max out electrolyte SG with enough time, but most batteries by then will never see max SG without an EQ charge anyway.
As far a AGMS being able to be drawn to 30% more often than flooded, my Northstar-27 is closing in on the 1000 cycle benchmark and IDGAF about how deep I discharge it. Hundreds of cycles well below 50% SOC. They key is the high amp recharge every so often and the true full recharge as often as possible as soon as possible.
The end amp figure is telling though, it now struggles to get below 0.4 amps at 14.7v and takes a long time to get there, and will eventually bottom out around 0.35amps then start increasing again where when new it would keep decreasing to somewhere under 0.05amps at 14.7 with enough time held there.
Voltage retention during overnight discharge is still ridiculously high. 12.2v under a 5 amp load with 45Ah removed for a 90Ah battery with nearly 1000 deep cycles and many thousands of engine starts accumulated over 5 years......color me impressed. Easily the best life from any lead acid battery I have cycled, but i can also treat it the best of any I have cycled
Its not as if 14.4v cannot fully charge it, it just takes longer. Perhaps when older with a few hundred cycles 14.4v cannot max out electrolyte SG with enough time, but most batteries by then will never see max SG without an EQ charge anyway.
As far a AGMS being able to be drawn to 30% more often than flooded, my Northstar-27 is closing in on the 1000 cycle benchmark and IDGAF about how deep I discharge it. Hundreds of cycles well below 50% SOC. They key is the high amp recharge every so often and the true full recharge as often as possible as soon as possible.
The end amp figure is telling though, it now struggles to get below 0.4 amps at 14.7v and takes a long time to get there, and will eventually bottom out around 0.35amps then start increasing again where when new it would keep decreasing to somewhere under 0.05amps at 14.7 with enough time held there.
Voltage retention during overnight discharge is still ridiculously high. 12.2v under a 5 amp load with 45Ah removed for a 90Ah battery with nearly 1000 deep cycles and many thousands of engine starts accumulated over 5 years......color me impressed. Easily the best life from any lead acid battery I have cycled, but i can also treat it the best of any I have cycled
