2 Pieces Z55H Replacement Battery, 3.85V 75mAh High Capacity Li-ion Battery for WF-1000XM4 WF1000XM4 WF-SP900 Bluetooth Headphones Battery with Repair Tool Kits

This toolkit and two rechargeable batteries have given my much loved and very expensive earphones renewed life for long into the future.I am very pleased.Of course you can pop the lids off with a strong thumb nail (which I did). But you are covered for all eventualities with this bundle here.Recommended.

Kit is generally good and has everything you need except the glue, however the tweezers are made of cheese and completely useless, i suggest buying a metal pair or at least metal tipped.

Job is done, this saved me spending another £200+ to a new set of ear buds, or at least paying the Sony Service Center to do it for me.

Its a shame things in life dont last forever, and thats especially true for small powered devices such as headphones/earphones/earbuds, they always seem to going after decent use admittedly, but seemingly too short a period.Luckily there are replacement kits such as these, I've replaced tons of stuff myself after saving many hundreds of pounds with service chargesThis kit is for the Sony WF-10000xx and WF-SP900 series of earphones/buds. Everything you need is included for the rather modest £22.98, I've replaced one already but I need to go slowly or I break things. You have plastic tweezers and number of prying devices and screw drivers that seem to be of a far better quality than normal and of course the Li-ion batteries themselves.

This comes with some handy tools. The metal pick particularly is helpful.Following instructions online, I sadly damaged the ribbon cable inside and my earbuds are now toast. But that is my fault.I can't comment on how well it works when reassembled. I can only comment that the kit. The batteries are correct.It loses a star, not because of my ape like hands, but because you can't reassemble without electronic glue, and this kit doesn't contain any. So you have to buy some.

For sony mx4 tou need 75mah or the app for the headphones will not show you the real charging functions. This is advertised as 75mah but on the battery it says 70!! Avoid this!