The battery on my trimmer will not hold its charge so I want to replace the Yardworks 24V lithium battery but told it is no longer available . Is there a substitute. Tried to call Yardsworks this morning and was advised I would receive a call back which I did not get. Tried again this afternoon and after holding for an hour the answer given is you have reached the mailbox of 420 and that was it, Certainly hope I get a better result with this. Thank you