Electric Trolleys and Lithium Batteries

My lead acid packed up after 9 months, I think Motocaddy had a bad batch. They were offering a lithium replacement for £130 which I bought. I love it, it charges in about an hour and a half, and is much lighter than the lead acid.
 
My lead acid packed up after 9 months, I think Motocaddy had a bad batch. They were offering a lithium replacement for £130 which I bought. I love it, it charges in about an hour and a half, and is much lighter than the lead acid.
How many charges do you think the lead acid had before starting to fail.?
 
Top