I've brought a mouse from Logitech -- G7 limited edition. Then broken, the support said: no limited edition to replace, so they give me a normal edition with no refund.
Years latter, now, the battery die -- they use non-standard battery -- so I contact their support center again, "sorry, no battery selling now, it's an old product ..."
Yes, it's an old product! Only old products need new battery of course!
Go to hell Logitech!