Try Orb.net. It’s a free, easy-to-use, excellent tool that checks if your device is the issue or if the internet itself is slowing things down. You’ll see exactly how your connection is performing in real time, including local vs. remote speed tests. 

Try the bounce test. Find a flat, solid surface like a countertop or hardcover book. Hold the AA or AAA battery vertically and drop it from about 8 inches (20 cm).

If it clunks and tumbles? Still got juice. If it bounces, It’s dead. 

Discharged batteries have a different internal structure that makes them springier. 

Cant find your cursor? Shake it. If your mouse pointer disappears, especially on large or dual monitors, just shake your mouse back and forth quickly.

On Macs, the pointer automatically grows larger, so you can spot it.

On Windows, turn on a similar setting: Go to Settings > Devices > Mouse > Additional mouse options > Pointer Options tab, then check “Show location of pointer when I press the CTRL key.” 

Now, tap the Ctrl key anytime you lose the pointer, and watch it appear with a ripple.