If you do you probably shouldn't. According to several articles online, wrong (non certified) chargers can literally make your phone explode, as while most of them use the standardized micro-USB design, the circuitry inside them is not the same. Not to mention that using them can void your warranty. That is why it's always worth it, to buy ones that are certified or supplied by your phone's manufacturers, even if they are more expensive. After all, chargers are not that easily damaged and are in any case cheaper than your smartphone.