Battery Tender ?

**MASERATI nut** · 03-18-2009, 04:56 PM

Spring is in the air! I've had car garaged for 3 months on Battery Tender. This is the first time i've used it. When I decide to disconnect it, does it matter whether I pull from electrical outlet 1st and then disconnect from battery or vice versa? Thanks in advance!

08 Maserati Quattroporte Exec GT
98 Mercedes C230

**loudog2** · 03-18-2009, 05:02 PM

I would unplug it first. I usually attach the cables, then plug it in. Then unplug and remove cables when I'm done.

**Harleyguy** · 03-18-2009, 05:22 PM

Did you leave the battery connected during this time ?? If you didn't disconnect from the wall first then hook up the postive lead first then the negative.

**MASERATI nut** · 03-18-2009, 05:27 PM

Originally Posted by Harleyguy

Did you leave the battery connected during this time ?? If you didn't disconnect from the wall first then hook up the postive lead first then the negative.

Yes, I did leave battery connected the whole time. So when I do disconnect I should unplug from outlet first correct?

**loudog2** · 03-18-2009, 05:33 PM

unplug before removing the cables from the battery.

**Harleyguy** · 03-18-2009, 05:34 PM

Originally Posted by MASERATI nut

Yes, I did leave battery connected the whole time. So when I do disconnect I should unplug from outlet first correct?

Yes from the wall first.If you leave the car for a long period of time you should get a battery disconnect .Most auto parts stores have them .The only down side to those you have to reenter you radio stations every time you disconnect the battery

**CharlesW** · 03-18-2009, 06:08 PM

Isn't the purpose of the battery tender to keep the battery charged and not need to remove or disconnect the battery?

**loudog2** · 03-18-2009, 06:17 PM

I don't disconnect mine. I'll still drive it a couple times a month.

**Harleyguy** · 03-18-2009, 06:22 PM

Originally Posted by CharlesW

Isn't the purpose of the battery tender to keep the battery charged and not need to remove or disconnect the battery?

They are used for both .I have customers that use them both ways.even if you use a disconnect you should still keep the battery on a trickle charge ,if left alone it will go dead and even with a fast charge it won't come back from the dead.Battery sulfation ,the only other thing to be carefull of is the battery running dry during storage time.More collector guys use a disconnect since classic have very little battery drain no computers running in sleep mose to drain the battery.Newer cars have many computers that drain the battery even if the car is in sleep mode .Sorry went off track some