CBQ 1500mAh MX Keys Replacement Battery for MX Keys K800 YR0073, 802085P 802085 533-000177 533-000221 533-000141,Wireless Keyboard Mouse Replacement Battery

I purchased this battery to replace my loving keyboard. The original was functioning well more than 6 years and was not holding charges recently, So I decided to get this replacement battery and this does not retain charge for only 2-3 days. compared to the original which I was charging it every 2-3 MONTHS. So basically it's working as if the battery was never replaces.

Six months later and it does not hold a charge. I have to get a new battery (from someone else).

Did the trick. A bit of a project to disassemble the keyboard to replace this battery, but well worth it. Good as new. A few good You Tube videos to help with the process.

If I could give this zero stars I would. It lasted one day.

Neither battery seems to want to take a full charge even though they are getting charged over night and if I unplug the charger they only last a short time. Not near what the original batteries were that came with these keyboards. The original batteries would take a full charge in a few hours and would last for a couple weeks before needing another charge. They lasted a full three years before needing replacements. These batteries do match the original in every way and look identical but think they were just old when they were sold to me. Chinese knockoffs.

The replaced battery only last about a day after over night fully charge. Got the same result two days in a row. Overnight charge it to full -> start using it in the morning -> by the end of the day, the LED shows red. Going to return, since my old removed battery still last about 3 days of the same usage.

I have to plug the keyboard in every couple of hours