After doing some research on extra batteries for the EM5 I ordered a pair of the Wasabis. Unlike the OEM battery, neither Wasabi will eject from the camera. It takes some fiddling to get them out, which is unacceptable. I am debating trying another brand like Progo, versus biting the bullet for another OEM battery. Are all the off brand batteries essentially the same, meaning the Progos are likely to not work either?