
I first posted on this sticky and then found this thread...
https://photography-on-the.net/forum/showthread.php?t=79584
This thread is longer and more active. I don't use the battery you are asking about so can't help you there...
Try the other thread, I seem to recall people asking about all types of 3rd party canon batteries. For what it is worth, the 3rd party BP511's work fine in the canon charger and don't get stuck...mainly because you can easily grab them with you whole hand and move them in and out.
It's when you put them in the camera that it becomes a problem. You can't get your hand around the battery at all....thus the need for prayer and/or unconventional and scary removal techniques!!
Thanks for the info. Well I think I'll try buying one since it's much cheaper than the Canon one and hopefully I can pry it out.