Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
Originally Posted by astuber
All of the batteries talked about in this post are lead acid batteries. Gel, AGM (absorbed glass matt), and SLA (sealed lead acid) are all names for the same type of battery. If you can buy a BMW Gel battery locally for the same price and support a local vendor at the same time then everyone wins.
The Gel type is not nearly as good as the AGM in my opinion. The Gel does not have the charge retention of the AGM, and needs a different charger if one wants to use a battery tender or the like. Unless left a REALLY long time with some small load on it, the AGM does not need to be kept on a tender, but standard liquid electrolyte and Gelled electrolyte do if left very long.
An AGM will sit on the shelf in a no load condidion for many months, and still have a very high percentage of initial charge in it. The others won't.
Yes, they are all basically lead/acid chemical batteries, but there the similarity ends. Still quite different animals beyond that, with the Gel and wet cells closer to the same than the AGM as far as charge retention goes.
I don't want to achieve immortality through my work...I want to achieve it through not dying.
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.