Poor quality batteries and unhelpful customer service

Thivha gets very high ratings on BidorBuy but this is not to be trusted as they have poor quality products and very unhelpful post sale customer support. Bought a battery from them that only lasted 5 months and then when I tried to return it for a warrantee claim we went around incircles for weeks with no resolution. Eventually Thivha responded that they would not warrantee the battery because of a supposed known issue with the inverter.