UE Boom 2 is having a non-removable Lithium-Ion (3200 mAh) battery and it Provides up to 15 Hours of continues Battery Life. So, Boom 2 has integrated reliable Rechargeable batteries and can be charged by USB port. Normally, all rechargeable batteries are having a limited battery cycle. In my market research found that Boom charging cycles would run up to one and a half years under general use.
Reference
UE boom 2 Full review
UE speaker Comparison table
UE Boom 2 Battery Replacement Instructions Video
UE Boom 2 Battery Life FAQ :
HOW LONG IS MY BATTERY SUPPOSED TO LAST AND HOW LONG DOES IT TAKE TO RECHARGE?
