94 CBR600F... Yesterday, the bike was running fine and starting with no trouble. Then last night I turned the bike on and tried to start it. It kicked over weakly then gave up. The headlights were dim, and it just looked like a flat battery. Even though I had been riding heaps yesterday. So I inspected the battery and it showed 10V. I charged the battery overnight and it showed +13V this morning. But when I when to start it did the same thing... weak effort, then it wouldn't even kick over. I suspect it's a bung battery and will probably try to get a replacement today. Does that sound reasonable? I just want to be sure before I spend money in case its something else. Also what are the symptoms of a faulty rectifier - which I hear is common for many Hondas? Thanks in advance.