600mAh AHB110520CPS, MH10048-H8 Battery Replacement Compatible with Bose QC35, QC35 II, QC45, QuietComfort 35, QuietComfort 35 II, QuietComfort 45 Wireless Noise Cancelling Headphones

Just what i needed to replace the battery in my wireless headphones.

My original battery was rated at 400mAh/1.9Wh and would run for over 2 hours. I bought this replacement because it was advertised at 600mAh/2.2Wh meaning it should generate more electricity and last longer.It lasted less than 30 min. Worthless.Bose won’t sell batteries for these but “U Break It We Fix It” will do a guaranteed replacement for about $50-labor & parts

I've been traveling with my Bose for well over a decade and love them. I've replaced the earcups once and now the battery. It is pretty detailed to do and requires some decent soldering experience as you are very near other components. If you've done some in the past, you should be okay but be careful and look at a few YouTube videos before doing it. Very helpful.

Replaced my battery with this after market battery. PERFECT, if your are looking for instructions on how to, Go to youtube. Bose 35

First battery I received didn't hold load for more than 2 hours, same deal with the replacement. I followed charing recommendations, to no success. Save your money, it looks like it's a gamble

After installing the headphones work like new. You must be able to solder on micro-circuits to install this battery. A micro small soldering iron is required otherwise you could destroy your headphones with heat.

battery was leaking fluid when received.