Definitively hard to get the battery out. it feels like its glued stuck, but actually it might not have been. WD40 is your saviour for sure. remove the usb port and press it down/out of the way to reach the back of the battery (in the middle) just spray some WD40 around the battery using a thin spraytube.. then let it soak and after that try to wiggle the battery side to side using small firm flat screwdriver. When you feel the battery is sliding more smoothly, then press with the rounded back of a thin strong pen or pencil on the back of the battery. Be carefull here of the thin flat white cable, and push it to the side first. I got the battery out with a firm push. hurray. after this it's easy to put everything back together! thanks guys for this info.