Mouse does not maintain the laser light when battery cap is installed, hence does not work

Here's a guide;
What do the battery lights mean on my mouse? Some keyboard and mouse models feature a battery light that shows the current status of the batteries. The following table describes the different lights and states.
Light
Device Model Status Single long green blink Rechargeable Batteries are good. This occurs when batteries are first installed or every time that the device is turned on. Slow green blink Rechargeable Device is docked in the charging station and is charging properly. Steady green Rechargeable Device is docked in the charging station and does not need additional charging. Steady green Presenter Mouse (Japanese version) Laser pointer is on. Red/green blink Wireless Device is discoverable (trying to connect to the transceiver). Slow red blink Non-rechargeable Batteries are low and need to be replaced. Slow red blink Rechargeable Batteries are low and need recharging. Fast red blink Rechargeable Device is docked in the charging station, but there is a charging error.
Reasons for errors: The wrong type of battery is installed; the battery or batteries are missing; or the battery connection is bad.
Solutions: Make sure that the correct battery or batteries are installed, and are installed correctly. If necessary, remove the batteries, wipe them with a clean cloth, and reinsert them. Steady red Presenter Mouse (Standard version) Laser pointer is on.

on the side where the mouse pad comes in contact with (where is that light is lit when the mouse should be working to loosen a screw or a plastic slide that hides a cap where the batteries are installed, if you use something thin (a small screwdriver ) to help to loosen the cap where the batteries are installed

Yes it is normal for the laser light to be on all the time.
And you will change your battery depending on its durability.
So when the mouse or keyboard stops working then you should know its time to change your battery.
I hope this solution has been helpful.

i have the mini m. for awile want to install in another notebook dont remenber how> helpppp

Try re-installing the drivers.

your mouse laser is damaged. please replace your mouse.

You shouldn't be able to see the laser, it wont glow like a optical mouse will. there should be buttons on the mouse and receiver that will connect the 2 devices and make them work together try pressing each for 5 seconds.

let windows install the drivers for the software (mouse) or use the installation CD that came with it then restart the computer

have you set reset button on USB if you have one
you may even have reset on bottom of mouse
also since changing batteries have you restarted pc

Normal 0 Try disconnecting the Mouse Receiver from the USB port and reinstall the CD software program. When the program asks you to connect the Mouse Receiver to the USB port, do so and it should work.
Hope this helps. Bud