Why is my battery draining so fast (only 3 hours playtime)

@helodi9250, The batteries in these units are very small, and if you use them a lot you will see degradation over a year.

Lithium-Ion batteries are good batteries, but when they start to degrade they need to be replaced (if possible).

There is no guide for that device replacement on here, so if you decide to go that route be sure to take some good quality pictures and take ample notes during disassembly. Then you create a new guide here, so others may benefit from your experience :)