I paid £250 for a replacement battery on my 2011 LexusRX450h to Lexus Hatfield in April 2019, I now have a problem with it holding charge, so I called Lexus Hatfield who will check it over, but to my surprise and extreme annoyance I was told the the battery had only a one year guarantee. Unfortunately I cannot find any batteries of comparable measurements to fit in the space. Any suggestions re other suppliers would be appreciated