Battery tender question

[SilentAttack]

So I bought a Deltran battery tender as I got back from a vacation and my car hadent been started in 1.5 weeks and I came home to an almost dead battery as my clock was zeroed out and my date said 12-28-13 (arrived 1-3-14).

My question: I fully charged my battery (green light) and had to disconnect the tender so I could pull my car out of the garage to put up the Christmas tree and pull my car right back in (15 mins) upon pulling it back in I put my car back on the tender and its been back on the charging (red light) for 2 hours now. Is this an indication that my battery may be shot?

[Lute__]

No, it doesn't mean the battery is bad.

If it never turns green then it may be bad or the connections may not be making proper contact.

Prior to connecting, I always use a scotch brite pad to scuff the terminals and contact points, turns green for me in a few hours.

[HankRearden]

My tender always takes an hour or two to go back to green.

Going to dealer again this week to hear their "driving patterns" crap again because I think this battery is shot. It's different now, many dud clicks on EngineStart button before it finally starts. What I do not understand is why I never had these problems the 1st year I owned the car (Oct 2011 through Oct 2012)? Seems much more chronic now. I'm afraid to drive it anywhere where I have to leave it sitting shut down & locked for a long period. Hope new battery cleans it up - even temporarily.

Any truth to the leaving it locked in close proximity to the keys theory?

[dparm]

Originally Posted by HankRearden

Any truth to the leaving it locked in close proximity to the keys theory?

I don't see why that would matter.

Have the battery tested at an auto parts store for CCA.

[White 13]

My charger does that too. I think two starts with no charging time drains the battery a little.

Originally Posted by HankRearden

Any truth to the leaving it locked in close proximity to the keys theory?

What is the theory? I think I missed that one.

Thanks

[SilentAttack]

Do you think there is any harm in just leaving the battery tender connected for long periods of time? 1-2 weeks?

[HankRearden]

Read somewhere that leaving key close to locked car may "keep it awake" / drain battery. SMU…sounds made up though

[W///]

Originally Posted by SilentAttack

Do you think there is any harm in just leaving the battery tender connected for long periods of time? 1-2 weeks?

It'll just top the battery off and not really charge, so you should be fine. These things are really low amperage (if it's same type as mine)

[SilentAttack]

Originally Posted by HankRearden

Read somewhere that leaving key close to locked car may "keep it awake" / drain battery. SMU…sounds made up though

Where I keep my key I can lock/unlock the car but can't use comfort access.