VI VINTRONS Battery for Logitech MX Keys, YR0073,

I purchased the VI Vintrons 533-000177 battery as a replacement for my Logitech MX-Keys keyboard (M/N YR0073) on January 24, 2024. I work from home and use my keyboard for several hours per day. The battery installed from Logitech would last for 1 1/2 to 2 months prior to needing to be recharged. Once the VI Vintrons battery was installed, I noticed that it was dying and requiring a recharge every two to three weeks. Over the six months this battery has been installed, the run time between charges has decreased to one to two weeks.It appears that either I was supplied a defective battery or that these batteries are constructed of sub par materials which do not supply the specified battery capacity. Unfortunately, I am well outside the Amazon return policy.