Replacement of the battery must be done by a Lenovo-authorized repair facility or technician.

Do not attempt to replace the internal rechargeable lithium batteries.When disposing of the battery, comply with local laws or regulations. Do not put the battery in trash that is disposed of in landfills.

We recommend that the batteries be charged about once every three months to prevent overcharge.

Stop using the battery if it is damaged, or if you notice any discharge or the build-up of foreign materials on the battery leads.

Do not leave the battery in an extremely high-temperature environment or an extremely low air pressure environment.

Do not short-circuit the battery, or expose it to water or other liquids.

Do not open, disassemble, or service any battery.

To avoid possible injury, do the following:

Battery abuse or mishandling can cause overheat, liquid leakage, or an explosion. Except the battery specified by Lenovo, a disassembled or modified battery is not covered by the warranty. General battery noticeĭANGER Batteries supplied by Lenovo for use with your product have been tested for compatibility and should only be replaced with approved parts. Pro Tip: If the method listed and described doesn’t work, open the Start Menu, click on Control Panel, click on Ease of Access Center (or Ease of Access > Ease of Access Center in case your Control Panel is in Category View), click on Make the keyboard easier to use, uncheck the checkbox beside the Turn on Toggle Keys by holding down the NUM LOCK key for 5 seconds option to disable it, click on Apply, click on OK, close the Ease of Access Center, repeat the method listed and described above and then check to see if that fixes the problem.The operating temperature range for the product is between 0☌ (32☏) and 40☌ (104☏). Once the Num Lock is off, press and hold it for about 5 seconds, after which you can let it go.ĭoing so will forcefully enable to dedicated numeric keypad, hopefully resolving this issue and allowing you to regain its use. If the Num Lock is turned on, press the Num Lock key to turn it off. If you are experiencing this problem because Windows 10 is forcefully disabling the dedicated numeric keypad on your keyboard, enabling it should fix the problem.

Lenovo wireless numeric keypad