Can someone please advise on a leisure battery ?

Morning all.

I appear to have read that much info over the past few days on leisure batteries that I don't know if I am coming or going.

At the weekend, when the weather was not the best in York, we were on a rally and my 4 year old leisure battery seemed to "die" on the 2nd morning (We drive a 2018 roller team fitted with a Varta 95Ah leisure battery and 120w solar (PWM controller ...... a Victron MPPT has been ordered)).

I fear that the leisure battery now might be goosed.

This weekend I am going to bring the van out of storage, where it has been in full sun, and put a load on the battery (whilst having the solar panel covered up with a blanket) .............. the load I am going to use is my avtex 12v TV which should last on the battery for 5-10 hours.

If it does last, then happy days, I got away with it.

If it doesn't then can someone please advise on a suitable battery.

Once a month during the summer we off grid for the weekend on a rally field, but in the winter we might only do a 1 night pub stop, but even that is rare.

We have full LED lighting, truma blown air, 1 x 12v TV and will be getting a 300/500w inverter to change up my laptop.

I don't want to go down the route of lithium as I will also have the expense of having to get a B2B

Thank you for any advice given