My problem is: the Radio beeps then shuts off, can you help?

If battery is faulty, you mat shockcharge it with a PSU put into 2-3 Volts over the battery voltage, the PSU should have a AM-meter, so you can monitor the battery, when the amp-meter shows low amp, it should be disconnected, DO NOT GO UNDER THE FIRST LINE IN THE METER, DO NOT OVERVOLTAGE the battery, you may, adjust the voltage between 2 and 5 volt over the batteryvoltage, with a PSU and watch the AMP-meter the same time! If you have a right PSU, the PSU will shut down when it reaches the right voltage.

This is ONLY for rescuing a faulty charged battery! Or a battery with reversed polarity (this has appeared som time, by letting battery die!)!

Your battery is dead or installed incorrectly. Check for correct placement then charge the radio overnight again. (Be certain the radio is always turned off when on the charger.)
If the problem persists you have a problem with your battery, radio or charger. Below are several troubleshooting tips to help determine which one is the culprit.
Charger: Check your charger for debris. If using a wall charger check to see if the tip is broken. Does the light on the charger come on when the turned-off radio is attached? If the light does not work on the charger, it needs replaced. (Chargers are like light bulbs, they burn out over time.) Flashing light: on a wall charger, it is bad, replace it; on a desktop charger there is an error possibly with the battery you are trying to charge.
Battery: Check your battery contacts for dirt or debris. Clean contacts with a pencil eraser if needed.
Check your battery date code. Motorola battery date codes are a 3-digit number followed by 2 letters, usually in a white box on the back of the radio. Example 312 MK. The first digit is the year, example "3" is 2003. The next 2 digits are the week of the year, example "12" is the 12th week. You may need to replace the battery. NiCd batteries typically last 18-24 months before needing replaced. Date codes from differ between manufacturers, call if you need assistance.
Try another battery from a working radio in the problem radio. If this corrects the problem you may need a new battery.
Radio: Check your battery contacts inside the radio. Do they fit snuggly against the battery - If not, you can carefully adjust them. (Remember to always put the top of the battery in first, then push in the bottom. This will avoid pushing the contacts too far up into the radio.)

vx-800u when i turn on it beeps over and over