Anyone else use the Rayovac 6v charger that they sell at Walmart? I bought one last year and it worked great, but I ended up throwing the instructions away. Now I have no idea what the blinking light means. I thought that the light would come on solid when charging, but it began flashing very rapidly. I thought that since my batteries were from 2011 they were bad, so I went and bought new ones. I plugged the new ones ins and they did the same thing. Can someone please tell me what the flash sequence on this charger means so I know if I have bad batteries or something? Thanks.