Help! my Mk2 Fabia VRS is killing new batteries.

My VRS has managed to completely kill 2 brand new batteries in the space of less than 24 months.

The issue first started when the original battery with the car (yes I know I should have replaced it years ago) started draining overnight/when it was left standing.

So I then bought a brand new Exide battery and things were ok for a few months. Then the car started draining the battery again, eventually resulting in it just not taking any charge at all. At this point I once again bought a brand new battery, but Bosch this time.

That seemed to fix it as the battery never went flat and therefore there were no charging issues.

Then I came to start the car earlier today and it was dead, completely dead. I got out my charger that you plug into the house electricity socket and started trying to charge it, but as soon as I connected it the charger said the battery was fully charged and wouldn't charge it any further. It gave me enough electricity try and start it but it was still dead, the relays clicked for about 2 seconds and then stopped. I now have to purchase a third new battery in less than 24 months, but the problem still remains and I have no idea what that problem is. I'm posting on here in the hopes that someone had a similar experience or some knowledge that could point towards the component/system that is either shorting/huge parasitic draw/broken/etc.

Here's some further information that may or may not be relevant.

• When this first started I took to leaving the doors open and the alarm off, so the alarm and remote central locking was not active when this happened.

• The car had been standing for about a week

• I noticed that for a lot of the battery flat instances that it had been raining beforehand, and that before this happened we had a huge downpour and thunderstorm.

• I also notice that on cold mornings the relays for the electric power steering will click whenever I turn the wheel.

Other than that I really don't know. I'm hoping that someone here could help me.

oh I meant to add if you need any further information please ask.

Thank you,

Eddfaf

Edited 2 hours ago2 hr by Eddfaf