[W126 Coupe] AGM Batteries

[Jonathan Hodgman]

Given the amount of Rust I've seen in the battery tray/fender well of 
560's and AGM's general resistance towards leaking in all but the 
nastiest of over charging situations is comforting.

IME, I've never seen a battery crank/have reserve like an AGM.  It's 
amazing how long they'll crank even on old worn out diesels in the dead 
of winter.
They weigh a bloody ton compared to a conventional flooded battery...if 
you are used to flooded you'll be in for a bit of a surprise first time 
you go grab your AGM!

MB started using them in diesels and large trucks, now they are in use 
across the board...  their original/HD design holds an appeal, I always 
enjoy a bit of overkill...;-)

jono


On 7/6/2011 7:51 AM, Flodur2 at aol.com wrote:

> There seems to be an impression among some writers to this column that 

> AGM batteries are not Lead Acid systems. They are. Further, they are 

> not really "sealed". All the ones I am familiar with have an 

> overpressure vent. Should the pressure inside the battery get too 

> high, due to overcharge, temperature or other factor, and the battery 

> is other than upright, it may leak acid although this is uncommon. 

> IMHO, the only real advantage or the battery is its small size and 

> weight. The more usual battery is a better value and will provide the 

> best combination of acceptable service and price.

> Rudy Boentgen

> W140 Coupes & Sedans

>

>

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