How long should I expect my lock to last? It is app. 3 years old will only lock & unlock app. 3 or 4 times then dies when the batteries are replaced... The batteries still have a full charge.when removed. Is there anything I can do besides replacing the lock?

This is the relevant excerpt from the Powerbolt programming and troubleshooting instructions:

"To determine why your lock is beeping abnormally, please follow these steps:

Take out batteries and unplug powerstrip.
Let it sit for 1 minute, then put the batteries back in and wait another minute.
If it does not beep, the keypad needs to be replaced (17733-1).
If the unit continues to beep, the powerboard needs to be replaced (A17734-3,3 Powerboard 1470 brass finish; A17734-3,26D Powerboard 1470 satin chrome finish; A17734-3,5 Powerboard 1470 antique brass finish)."

Since you've already gone through the battery change, try the battery remove-reinstall recommended above. If that doesn't work for you it suggests that you need to replace the appropriate Powerboard for your lock.

So this is the link to Weiser Customer Support Page, where you will find the appropriate number of your location:

http://www.weiserlock.com/en/CustomerService/ProductSupport/SupportContact.aspx

I suggest calling the appropriate toll-free number and having a conversation with a representative about this problem. You will want confirm that you need the part before you go through the expense, and that it's worth it. You will need to know the "finish" of your lock. Try to talk them into warrantying the part, in spite of the age (one year warranty on electronics), as a matter of good customer relations. They will help you get the correct part on order.

Good luck--and please provide feedback if this helps!