Starting issue

[Mtsans]

So I recently took out my 2000 986 out for the season.  Battery was dead so on the charger or went.  Next day started it up and off I went. Next day it won't start.  Battery was up. Put the key in and lots of lights and clicking  but won't turn over.  So I boosted it off my truck starts like a charm and runs well.  After reviewing posts I removed my seat and check the immobilizer.  It was dry no corrosion as I never drive it in the rain and store it in the garage.  All fuses r good. All contacts and clips r good on immobilizer.   Each try I won't start but if I boost it or runs and turns over no problem.  So it can't be a start issue. Battery charges and alternate shud b good.  If the car will Start amd run off a boost i wid think the immobilizer shud not be active. Amy ideas

[Loren]

You need to remove your battery and get it load tested my guess is that if it is 4 years old or older you will need a new battery.

[Mtsans]

Loren u know I have been racking my head and can't see what else it did b.  With a boost starts right away.  Now I did charge it but the charge does drop very fast for turning it over 2 times.  K I'll go to a garage and give it a ****.  Thanks for taking the time 

[Mtsans]

Changed battery today. Fired up and off we go.  Thanks for ur input

[Schnell Gelb]

Not really. And it is easy to get a reliable diagnosis. Buy a $30, S.O.C. & S.O.H. Battery Tester. Easier,cheaper and more reliable than "toaster-style" load testers and cheaper than the carbon pile alternative.

Next ,get a battery charger that has an automatic "Pulse" or reconditioning function to remediate the sulphation. If you get the type Porsche uses(but without their sticker) it can be used as an over-winter maintainer also. CTek MUS 4.3.