My car is ten years old....the original battery lasted until I left the interior light on about two or so years ago.
The chap who came out said it wasn't holding a charge now so he started it and followed me to Halfords where I bought a new one.
That one lasted about eight months til I left the light on again....all this searching for my lost mobile in the dark does it.....
Again the battery wouldn't hold a charge so I had to have a new one. The chap in Halfords said bring the eight month one in and he'd check it but it was usually what happens when a battery goes flat.
So, before I fork out for a new battery, is it normal to need a new battery each time...or should this one charge up?
Hi, Methyl......this went flat with no lights left on....and it gets a jolly good run quite often......far and fast. Just standing for three weeks I guess.
The battery that made it to Halfords wasn't this one.....the guy started the car and followed me to Halfords......saying it would make that journey but wouldn't charge up enough to be reliable.
I once flattened a battery in much the same way as you just have.
In my case I left the car at an airport car park and it was as dead as a dead dingo's donger by the time I flew back after three weeks. The alarm system had just gently flattened it.
A jump start and a 100 mile run home sorted it with no problems - there's quite a difference between a gentle flattening by an alarm and a 'lights on all night' disaster.
A catastrophic short can kill a battery, leaving the lights on may hurt it too, but a gentle discharge by an alarm system shouldn't do any permanent harm.
Even the cheapest battery has a 12 months warranty. The more expensive have 2 years. If you can find the receipt take it with you. If you can't find the receipt Halfords may have it on their system when you bought it.
IMHO they should replace the battery, at no charge ( no pun intended ) if it only lasted 8 months.