Leisure battery for Lancashire es 2005

I’m thinking of replacing leisure battery (under drivers seat)for a lithium battery but can not find anything that’s is small enough to fit.if some kind person could give me exact dimensions, as my measuring may not be exact.I am a newbie so bare with me.
Lancashire es 2005 model.

An introduction in the welcome section above would be appreciated, can't help re dimensions in your vehicle but if you use the search facility above you will find switching to lithium is expensive and fraught with problems as existing van electrics won't cope with lithium. There are many other improvements to leisure power system that would improve functionality although you don't say what the reason fir wanting lithium is ie what improvements do you expect for your investment?

Tayna is my #1 choice for any vehicle related battery,less than 24 hrs delivery and a website which has all poss details of what you think you want.
Do you have solar?
Why do you think lithium is a viable alternative to SLA?
If you have decent solar, connected via controller directly to the batteries, then 110Ah SLA will satisfy virtually all needs (unless you have special needs such as medical).
For the difference in price between lithium and SLA, if you don't have solar, then the difference in price will easily cover the cost of 100w solar + dual batt controller google photonic universe....

Thank you.

Cant see the link above being any use  as the reg no  result would be  for vehicle   starter  battery  ,, check out alpha batterys  lead  carbon deeper discharge  1500 charge  cycles . less fitting issues.

rogerblack wrote:

Molly3 wrote:Can5 see the link above being any use  as the result would for vehicle   starter  battery  ,

Leisure batteries here:
https://www.tayna.co.uk/leisure-batteries/

If you can tell us more about your existing leisure battery, e.g. any of these you can determine Make/Model/capacity/size we might be able to help you select a valid replacement.

Also as requested above your reason/s for wanting to change to lithium (which is likely to prove problematical).

How old is your present battery? What problems are you having with it? 
The more info you can give us, the better we will be able to help you. 

My leisure was totally flat this morning (thought was showing low volts because of cold mornings... but most likely its last cry for help), so going to buy a new one. 
Another expense and another con the previous owner of my Broadway EB pulled... said was replaced when bought, didn't provide receipt/warranty for the pancake.

Thanks for link to Tayna and their reasonable prices.

Had this: L35-115 Yuasa Leisure Battery 12V 115Ah
Going to upgrade to this EFB: L36-EFB Yuasa Leisure Battery 12V 100Ah

Fingers crossed Tayna live up to expectation.