3 month old Duralast AGM is toast?

Joined
Apr 27, 2010
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19,340
Location
Suburban Washington DC
It's an H8 in the Mercedes S550 I bought. Charger kicks off after 15 minutes and the battery is at 5 volts. What are the chances AutoZone will comp me a new one without the receipt?
 
without a receipt? not much chance ace.

Even walmart hassled me with a receipt.
 
I once used a bank transaction to show i bought something at AutoZone. Maybe pull it. If you have a number registered with them it should be in their system for sure.
 
I was told by Autozone that it isn't a worry if I don't have the receipt. They register the battery to your account through the phone number.
 
Connect it in parallel with a standard lead acid battery using jumper cables and try charging it again.

Something about the internal resistance of AGM batteries being different that doesn't jive well with many battery chargers causing false 'fully charged' offs. Something like that.
 
They gave me a new battery with few questions asked. Didn't see that coming.

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Is this pretty typical for German built batteries or is the process of shipping batteries detrimental to their lifespan?
 
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