My husband and I both have BB pearls.. he had a Tmobile Wing prior, kept that charger when he sold the wing and gave the BB charger with the wing on accident, now he uses the wing charger to charge his phone but it looks like it's charging.. then when he goes to work it's dead in an hour. I think it's the Wing charger, he thinks it's the Auto Lock program on it.. Whats your opinion? In other words who is right and who is wrong! LOL
try taking auto lock out and see if improves. also consider using other Pearl charger for it as well. I use a motorola charger on my Curve and have great battery life so don't rule out the battery itself.