SLK55 - Is battery AGM or GEL - need trickle charger - Mercedes Benz SLK Forum

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#1 Old 10-14-2012
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SLK55 - Is battery AGM or GEL - need trickle charger

Hi,
I have a SLK 55 AMG 2007 and I'm looking to buy a battery trickle charger. Based on my searches, Battery Tender is pretty good and is cheaper (http://www.amazon.com/Battery-Tender-021-0128-Plus-Charger/dp/B00068XCQU/).

I want to confirm that OEM Varta battery is AGM and not GEL since they have a different model charger for GEL (http://www.amazon.com/Battery-Tender-021-0156-Plus-Charger/dp/B000NCOKQK/).

Also, I've seen DIY solutions to make it easier to use the trickle charger (eg. https://www.slkworld.com/general-modi...install-2.html), but what's the simplest way to charge the battery ? Anything I need to know besides the instructions that come with the charger? Thanks a lot!
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#2 Old 10-17-2012
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The OEM is not a gel cell, so your first option is the correct one. I've had good results with the BatteryTender.



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#3 Old 10-24-2012
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I just bought one and it work perfectly. Since my Slk parked 6 days per week, I need to keep the battery up. My 1st charges took about 3 hrs. then the green light start to flash (80% charges). I'll charges it again tomorrow until it full.
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