I was given a Battery Tender to use on my garaged G35c. Battery Tender makes several different chargers for specific battery types. I am pretty sure the battery is a lead acid type however, there are Flooded, Sealed, VRLA, AGM, GEL etc. type batteries. On the battery, what I can see is 80D23 for an identification.
Has anyone used the Battery Tender before and your thoughts ?

Thanks for your time.

 

http://www.landiss.com/battery.htm

Some neet info here about batts

 

I use a 2AMP charger to trickle charge and condition the battery every 2 weeks
when garaged in the winter time. I don't keep it in its floating state.