Have a Galaxy Ace ii X for ~2 years and recently it has been randomly shutting off. After the random shutoff I must wait a short while before turning it back on. Once it is back on the %charge of the battery will report a new random number, but usually lower than before it randomly turned off. The phone is not overheating nor is the battery bulging. It still seems like a battery issue, but wanting to be sure before buying a new battery only to find out it is an issue with the phone. Do Koodo stores/stalls have battery testers to be able to check them? Or another store like Futureshop?