ultraman

My 02 TT is completely dead. can't lock/unlock the door with the remote, alarm light not on. try to start the car, nothing happen not even the clicks. nothing come on when I put the key in on the dashboard. Is the battery dead?

AudiMick

Probably, how old is the battery?

Get a voltmeter and check see if you have 12+ volts at the battery terminals.

ultraman

I think it is about 2 yrs old Exide battery. I'll try to get the voltage tonight

AudiMick

Most batteries last at least 5 years. More likely you have a bad connection or one of the main fuses on the top of the battery has blown or come loose. Other than that maybe something draining the battery like an interior light left on.

How long since you have driven the car? If the car is parked and never driven , under normal circumstances the battery should last 6 -8 weeks before it dies.

ultraman

I just left it for a day and half... but I had couple weak starts recently and the car won't beep when I locked the car couple times.

ultraman

I disconnect the battery and check the voltage. It reads ~10v. Does this mean its dead? Should I try to get it recharged?

AudiMick

That shouldn't be happening with a 2 year old battery.

It should be 12 volt (usually 13+ quite often), buy or borrow a charger and try charging, then measure again. If it's that low it needs at least overnight charging.

Expect the charger to go to at least 8 amps as soon as the charger is turned on then fall back slowly. If after a couple of hours it's hardly drawing any current your battery is "not long for this world".

Most auto stores can check the battery but it needs to be fully charged before they can do that.

TTinCT

The battery is most likely toast. Most lead acid batteries do not do well after a discharge to that level...you can take it to an Autozone for testing, but not expect good results...While voltage may appear ok, it is when a load is put on it that tells the story.
if there is a warranty on the battery (and good batteries come with at least 36month warranties) it should cost you next to nothing to replace it...

Anything less than 12.4 coming out of a battery on the TT and the car will have some odd electrical gremlins....it is very sensitive to electrical...