Battery refresh problem

I hadn't used my old CC645 VHS-C in years, but when I took it out of mothballs it seemed to work fine, although the battery was low. I put the battery in the charger and pressed refresh. When the light came on that it was done, I lent the camera to a friend, but I didn't test it first. He couldn't get the camera to operate and when he gave it back neither could I. I figured there was a problem with the battery, so I put it back in the charger and pressed refresh again. Now both the refresh light and the charging light are flashing at the same time. Is that normal? Do I need a new battery? I'm confused.