Lithium battery for MK3

Hi
I want to convert to lithium battery for my MK3.
My problem is that I can not figure out how the size / capacity description is.
I have now used an 18 amp / hours, (maybe a bit powerful). I wish one that corresponds to 14 to 16 amp.
What is the term in lithium terminology?

Vidar

Rightly or wrongly, they (Shorai, at least) use the same terms in most adverts. The Shorai I have had on my '73 with Alton E-start is a 14 AH. It's been fine in the bike for 5 years. Whether the OEM Norton starter takes more or less power to operate than the Alton, I don't know. But Shorai has an 18 AH which is what Old Britts recommends for the Mark III.

I ran a Shorai LFX21 on my MK3 for a couple of years, on the advice of Matt at CNW, and it worked great. It was the largest one I could fit in the battery box. It did expire right after the warranty ran out, at two years (they have a longer warranty now), but that was probably because I let it run down too much several times. I've run a couple of Shorai's on other bikes with no problems.

Ken