Why does my phone battery die when I'm charging it?

Episode 1273 (2:23:37)

Dave from Torrance, CA
Samsung Galaxy S6

Dave is having trouble charging his Galaxy S6. He plugs it in when it's low and it will continue to drain until it dies before it starts to recharge. Leo says it could be this app Dave has called DU battery saver. Leo says that those apps often take up more power than they save. It could just be a defective battery. Dave may want to talk to them about replacing it.