Canon is recalling a small number of PowerShot A530 and A540 digital cameras that run the risk of short-circuit which leads to overheating. Affected cameras can suffer from extremely hot battery doors and drastically reduced battery life. Canon warns that the spring that holds the battery door on affected camera can become so hot that it could possibly cause burns.
This is definitely the year for hot batteries and it doesn’t look like it will stop. You can learn all about the problem and see what models are affected here.