Yes, games can waste your battery. When you're playing a game, your phone is working hard to render the graphics and keep the game running smoothly. This can use up a lot of battery power, especially if you're playing for long periods of time. Additionally, many games require an internet connection, which can also drain your battery if you're not connected to Wi-Fi. If you want to save your battery while gaming, try turning down the brightness of your screen and closing any apps that you're not using.