nope not the battery it is brand new 4 months ago.
My water levels are going down actually so water is going somewhere sure.
Hydro lock happens suddenly never over long period of time combining with
1. Water loss
2. Engine heat up 9 months ago and white smoke that was water (smelled it and it have no oil smell in it only little bit petrol smell) when started last time and on idling it was giving smoke car was parked on on step of stair under the boot and whole stair got wet and I checked it after drying so far not found the oil stains so concluded it was water being evaporated.
3. It happened suddenly not over the period of days or weeks within 5 KM driving it gone down. so these things made think of hydro lock that gasket is suddenly more damaged then it was from 9 months or so
Also can't use the inlet as handle because unable to free the fuel lines they are stuck and bolts are rounded completely so decides to remove the intake instead of battling the fuel line or I remove the complete throttle body from the intake and leave it there in the car.
White smoke due to winter may be but those vanishes after reaching the boot height maximum, mine was going above to the first level of building (ground being ground then first story)