Slistack
Nice write up. I have had my H2100 yellow for a good 2 years now and really like it. My mic has gone to garbage so I started shopping around for wireless headsets and honestly couldn't find one that fit as nice and tight as this one, so my goal is to revive it since I am only getting about 4 hours of battery life on it now.
One thing to note is that if you are experiencing a hiss sound, you could consider uninstalling the corsair software and then use Razer Surround Pro. They sell it for $20; however they periodically give it for free, which is how I had gotten it. I found that the sound quality greatly improved and the hiss was gone after I moved over. The funny thing is that the H2100 sounds far better than the new Razer Man O War wireless with the same software. YMMV but I believe it was greatly due to how tight my ears fit and seal within the H2100. The Man O War has large circular cups that don't really seal.
Thus far the only mod I have done was replacing the ear pads with a set of memory foam with pleather cover: https://www.amazon.com/gp/product/B00MFDT894 I noticed that with these ear pads the headset seals better around the ear and it gives it more depth. They also can easily be cleaned unlike the originals.
For a mic I decided to pick up a Blue Snowball Ice for $45 since during my tests of different wireless headsets, I really didn't find one with a mic that I cared for. I'm considering removing the internal mic entirely when I open it up for the battery replacement.
Before I rip apart my headset I wanted to check with you on an update of how yours is doing with the battery mod. Here is the battery that I ordered a few weeks ago: http://www.banggood.com/Samsung-ICR18650-28A-18650-3_7V-2800mAh-Li-ion-Rechargeable-Battery-p-942043.html
Any updates on your battery situation? I attempted to find you with the same username on Steam in case you no longer frequent this board.
Thanks