I remember dropping my Samsung Galaxy S3 and the battery flying out. lolMy wife had a Samsung Note 2 from circa 2013. I could pop the battery cover off with a coin or even a fingernail. When she was complaining about poor battery life, I got an OEM replacement from Amazon for maybe $20. But it certainly wasn't water resistant, which is the primary reason why it's so difficult to replace a battery these days. It's not a trivial thing to restore the water resistance since it requires training and the proper equipment to perform the service.