Have owned a couple of Wisper 705 T bikes for about 4 years now, still like new, never given us any real problems unfortunately the 575w rack battery wont charge any more, tried both chargers. The other bike has a 375w battery and that's fine. Decided to buy another 375w rack battery as we only tend to do short trips out these days. Having problems trying to find a stockist who stock them, Wisper are out of stock, and have been for a while. Can anyone recommend somewhere else to buy a new one. Oh and before its mentioned I don't want to have the 575w re-celled, looked into it a while back, not cheap when you take into account the postal costs, and reliability of work done. Thanks