Help with Lithium Batteries.

After 11 years of use my inverter blew. I had a new inverter installed but there was no life in it. The lithium batteries that I had purchased from Geewiz three months ago appeared totally dead. Three electricians looked at it but had no idea what the problem was. So I took the inverter with the batteries back to Geewiz. I was greeted immediately by Damien who instantly diagnosed the problem and to my relief, in no time, I had two functioning batteries and a functional inverter. Damien's efficiency was only exceeded by his pleasantness. Thank you Geewiz and thank you Damien.