Shoddy low quality batteries that can permanently damage your phone. I brought in my iPhone 5S in January 2018 to get a replacement battery but it only lasted about 4 months before my phone dropped 80% charge in under two hour. They replaced it in June 2018 but the same thing happened until one day it repeatedly turned off and on losing 30% charge each time. Overnight the battery swelled so much it pushed the screen off my phone (pictured). The first battery they supplied was either low quality or faulty. The second battery suffered a catastrophic failure that could have permanently damaged my phone. The repairs have always been fast and the staff friendly but definitely go somewhere else instead. Save yourself the hassle and potential permanent damage.