Battery Tenders
So, my question is what are main differences between these particular models , I asked my dealer but as of yet they not replied me back with a clinching answer
Thanks for your time
This one :

And this one :
I have replaced many modules damaged by both.
My best suggestion: Follow the owners manual and factory service manual.
roy@pelicanparts.com
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Funny thing, I had seen a brand spanking new W221 S350 BLUETEC with the bigger charger was connected in the dealer's lot but I had not paid any attention whether the battery was disconnected from the car or not.
Thanks again
I have replaced many modules damaged by both.
My best suggestion: Follow the owners manual and factory service manual.
roy@pelicanparts.com
Yes the factory says this and its the safest given the various ways we may charge batteries, I have a 30 yr old and probably destructive to modern electronics charger I never use, I think thats why the removal suggestion persists. The cetek I use (us3300) is highly rated for its clean dc and hook up safety and ctek says you dont need to disconect the battery. I charge my winter stored MB every couple of weeks with the bat in place, no problems, and I know how to remove it and re snyc the car. Note thier 7002 charger even has a clean 12v supply mode for battery changes.







