I own a pair of Sound Sport free wireless headphones which I have purchased on 12-2018. Recently, I have observed a significant drop in battery life i.e., a total of 1 hour and 30 min. I have updated the firmware to 2.8.0. Also, the battery percentage goes to 20% and then suddenly jumps to 40% without charging. And the completely drained earbuds take just 5 minutes to reach a 100% battery level. I have contacted local Bose service center and they said the replacement incur a cost which is unfair as these pair is just 15 months old. I am also afraid that will it be happening to my new Bose NC700!! Is there a solution other than a replacement? Please advice!!