Did a little reading about car battery's. Seems the biggest thing that shortens the life of a car battery, besides draining it till it goes dead, is overcharging the battery... ...that the temperature of the battery during charging is critical, with lower charging voltages when warmer and higher charging voltages when cooler....
This reflects what I see in new vehicles with Volt Meters.... ...warmer temps produce lower charging voltages and vice-a-versa...
I've taken several long trips and I have yet to see charging voltage drop to the low 13's... ...I have seen it drop to low 13's on occasions, but only for a few moments on short/normal trips.... ...not long trips where the battery has been charging for hours...
I keep finding conflicting advice on charging AGM battery's with a battery charger... ...some stating you can only charge an AGM battery with an electronic controlled charger specifically designed for AGM battery's or has a specific AGM battery mode... and all sorts of advice in between that and just use a regular cheap battery charger.... ...those in between include, just use the trickle charge setting for AGM or putting a resistor or device in series before the charger to reduce the charge voltage of the cheap old charger....
This reflects what I see in new vehicles with Volt Meters.... ...warmer temps produce lower charging voltages and vice-a-versa...
I've taken several long trips and I have yet to see charging voltage drop to the low 13's... ...I have seen it drop to low 13's on occasions, but only for a few moments on short/normal trips.... ...not long trips where the battery has been charging for hours...
I keep finding conflicting advice on charging AGM battery's with a battery charger... ...some stating you can only charge an AGM battery with an electronic controlled charger specifically designed for AGM battery's or has a specific AGM battery mode... and all sorts of advice in between that and just use a regular cheap battery charger.... ...those in between include, just use the trickle charge setting for AGM or putting a resistor or device in series before the charger to reduce the charge voltage of the cheap old charger....