Battery dead after winter storage

AlphaSnacks

I'm leaving town for 6 weeks, flying back to NYC.

What should I do about my Z? Should I disconnect the battery?

SouthArk370Z

My first guess is that the tender was not connected properly - not making a good connection. Edit: or polarity reversed.

Second guess is that the battery was not fully charged when put up for storage. Most tenders are not really intended to charge a battery.

Third guess is that you have something drawing more power than the tender can keep up with. Have you made any mods that might be drawing power when the car is shut down?

Fourth guess is a bad battery tender.

Last guess is the battery is bad. Although it's not unheard of for a battery go go bad so soon, it's not all that common, either. Since it seems to be taking and holding a charge, the battery is probably OK.
Check the electrolyte level in the battery and add distilled water (not filtered water, not deionized water, but distilled water) if needed. You can remove the frame around the battery cover if you need more room - see one of the pull-the-SLU-fuse DIYs for details on removing it.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

SouthArk370Z

Invest in a battery tender. Disconnecting the battery is not a good option on modern, computer-controlled vehicles. You will lose tuning data, radio presets disappear, and the windows will forget how to roll up.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma