I have been using my N900 for about six years with little problem. Recently I went camping in Giant City State Park in Illinois. Now I have a problem. It started when I was trying to charge the N900 in the lodge there. The N900 shut down. The battery drained, and I haven't been able to charge it with the normal power cord. I hadn't been able to get it to charge for weeks. I've been using an external battery charger. The USB connection hasn't fallen off, I can still stick the plug in. Too, I have an LG phone with a similar microusb charger. I stuck that one in last week, and it works to charge the N900. Unfortunately I can't get the N900 to connect to an external cpu for "mass storage" file transfers. I also noticed that while the N900's off it drains the battery; the keyboard stays lit. So what's wrong?