Slistack

Let me start by saying I love the H2100 headset. I got it for 50 bucks on corsair refurb. Recently I wanted a new headset because of my battery life and the boom mic being all loose. So I took it apart and I will show you what I have done. This tutorial is for semi advanced users, just take your time and be careful. These little batteries if not handled carefully can be dangerous. This is my first post, I hope I can help someone out there.
 
First to deal with the boom mic problem...... I have had my headset so long that it has actually worn out the little nubs on the detentes. So i took an exact-o knife and cleaned up the nubs and then took a pointy soldering iron and made deeper grooves. Then cleaned up the grooves. As you can see in the first two photos. Then I tightened up that Phillips screw that holds that arm and now its nice and tight and the boom mic doesn't flop around.
 
 

 
 
 
Now to the battery upgrade. There is a silly little 680mAh lipo in there. So I said to myself I bet i could fit a nice 18650 battery with a 2800mAh lipo.
 
Turn on soldering iron again, and take out the battery and unplug.
 
Step one: take the right ear cup apart.
Step two: Turn on soldering iron again, and take out the battery and unplug and take battery completely out.
Step three: You need to take the platform that holds the battery, it should look something like this, after your done. 
Step four: Test fit battery
 
 
 
 
Make sure the battery is lying flat, check this by putting the ear cup back on top and make sure it sits flush.
 
 
 
 
 
 

 
 
Step five: disassemble the old battery, we need the battery management system and the connector from the little battery. This little board is the charge controller.
 
 
 
 

 
 
 
Step six: cut the battery off of the little pcb board. Be superrrrr careful this little battery packs a lot of punch! Do not touch any wires together. Anyway after you cut the battery off solder some wires onto the pads, as you can see i have sharpied the right hand side there with black indicating negative. Also you can tell from the wire colors and where they go.
 
 
 

 
Step seven: get some little short wires and solder them to the battery and to the BMS board. I would highly recommend buying one single legit 1860 with tabs on it, mine happens to be a LG.
 
 

 
Step eight: Put the battery in there and tuck the bms board in there and plug it back in. Also the BMS board had some kapton tape on it, put that back on or tape up the board so it doesnt do fun things. I realise now that you should also put a piece of from in there so the battery doesn't rattle around. Before you close everything up make sure you check all the wires and stuff, these batteries are very torquey! 
 
 
I hope you enjoyed my mod to my 2100's I thought i should post because I haven't seen anyone post anything like this before. Now I have one of the best and affordable longest lasting wireless headsets.
 
 
I have not done any testing yet because I just did this but I can post with an update with new battery life times!