Video helped, but it was super easy anyway. If you are not scared to solder a few wires then this is great. My beats had gotten to where they only lasted about 20 minutes on a charge. I’ve used for over an hour a couple of times now and they were still playing when I turned them off.
Replacement Battery for Beats X Wireless Headset by Dr Dre 3.8v 50mAh NEW 3 Wire
How to Install this replacement battery on BeatsX (IMPORTANT).White wire solders to area where the gray wire on original battery was soldered. Red wire solders to where white wire was soldered to on original battery. Black solders to the same place as original. We recommend to take a pic before unsoldering original battery.