Posted by jdemaris on January 01, 2011 at 13:56:03 from (67.142.130.17):
In Reply to: Battery Question posted by DiyDave on January 01, 2011 at 11:19:54:
Optima is an AGM battery and AGMs are not the most "forgiving." They are easily ruined in poor charge conditions or when the "equalizer" mode is used on some high-end chargers.
AGMs have specific advantages and the extra price is only worth it if you NEED those advantages. Vibration resistance, small self-discharge, and being spill-proof.
I've been using BCI #75s for years in several of my diesel trucks (a pair in each truck). I've got a pair of Deka 75s that are 8 years old and a pair of Johnson Controls 75s that are 7 years old.
Three are only around three companies making all the starting batteries in the USA. Johnson Controls, Exide, and Deka.
Caterpillar and NAPA (in the northeast) sell Deka. Interstate, Walmart, Subaru,Case-IH, and Autozone sell Johnson Controls.
If you have short battery life, find out why. If it's excess vibration, use an AGM or a standard commerical battery. If you have long-term storage dead battery problems, get a $20 battery maintainer and/or get a battery with lead-calcium inside of it. Lead-calcium is used in AGMs and standard commercial-type batteries. It allows slower self-discharge when a battery sits for long periods of time without being charged.
By the way, my father-in-law just replaced his original 10 year old, conventional lead-acid battery in his diesel Japanese-Ford tractor. 10 years in a diesel tractor is pretty amazing.
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