The blink pattern indicates a temporary failure of the battery. Don't worry, it does not mean that battery is going to explode. Try following simple fixes.

 

1. Update BIOS. You can get the update here.

 

2. Remove the battery from computer and let it cool down for 1-2 hours.

 

3. Discharge the battery completely and then recharge to 100%. Repeat this 2-3 times.

 

If all this does not solve your problem, then contact Technical support. Betteries have one year warranty and they will be able to replace the battery if it is still under warranty.

I had this happen on my 16 month old Inspiron 9300.  My battery was not covered under the recall, nor was it covered under any other warranty.  It meant my battery had died.  I had to order a new one.