Don't know that it's possible to reprogram to show a percentage.
I used to read on my Clie and like you hacked it to show a % instead of just the bars. I found that really useful on the Clie, because the battery drained so fast. I also find that I don't miss it on my Reader--because of the long battery life. My battery rarely gets below two full bars before I decide to recharge it.
dordale
