I broke down and replaced the battery yesterday. Local shop wanted $75. Bought one on Amazon with tools for $18. Took about half an hour. And fingers crossed, it seems to be doing good. The battery showed
47% charge when I replaced it. I used it the rest of the evening and it only dropped to 33%.
That's great! Mine got so bad I quit using it. I even tried an external battery and it would say it drained and then shut down, even when the battery was not drained. I've been using a Fierce XL. I'm thinking mine has some kind of defect. However, if
yours was doing like that and a new battery cured it, it would be worth $18 to find out. I may try it and see.