Synergy Digital Headset Battery Compatible For Plantronics W440 Wireless Headset Battery Li-Pol, 3.7 Volt, 140 mAh - Ultra Hi-Capacity - Works With Plantronics 82742-01 Rechargeable Battery

hi everybody in this video I'm gonna show you how to upgrade or replace lithium batteries in your wireless headphones so if you have an expensive pair of headphones usually there's no need to upgrade the battery because in most cases they already have high-capacity batteries but if it's cheap stuff like these then you can definitely upgrade them to the high-capacity battery which will cost a few dollars so let's get started first of all you have to figure out how to disassemble your headphones usually the battery is housed in the side with a nice B port next you need to remove the ear cushion simply turn it counterclockwise or pull it off depends on the model and now we can get access to the screws in my case I just need to separate these two parts and we're inside so before we go any further I want to take a picture of the PCB with all these wires just in case we end up soldering some