Some counterfeit and third party power adapters and batteries may not be designed properly and could result in safety issues.To ensure you receive a genuine Apple battery during a battery replacement, we recommend visiting an Apple Store or Apple Authorized Service Provider.
This may lead you to think that the web page has frozen.
It has not; it is waiting for the applets to be unblocked.
NOTE: As of April 2015 Google Chrome has disabled plugin support necessary to run Java applets, such as Physlets.
Other browsers (Firefox, Safari, and Internet Explorer) still support Java applets.
New apps are released daily and we are constantly updating the site, so make sure to bookmark us on your mobile Safari browser or computer and visit us regularly for the latest developments.