Dear Concern,
As its  is a serious concern now after so many refernces i have to write the mail , i got curvw 9220 device and i am using bb from last five years as i have to be mail connected everytime , so i switched to this new curve 9220 persisting the same problem in my old handset 9320,
>the device get switch off everytime you recieve any calls or if any mail to open or any application installation ,
>and moreover when ur in between calls it get switch off ,
> the device shows battery loss on full charge and get s off it shows radio signals off.

i am totally dependent on this phone and what to say its now its a nightmare for me i really getting fed up from bb , the thing is that i am a ceo of a firm and to sort out many calls and mails frequently i have ti stay connected evrytime  and if this type of service i get from the company like bb i will be very much feeling low on the part ......if any one can help out ...i have also mailed on the support for the same my request no is : INC000027333360   
Hi and Welcome to the Community!
First off, to set your expectation correctly, please see this "sticky" post, along with the threads to which it links, for helpful information to guide you as you proceed:
Hopefully, this information will be of use to you.
Concerning your specific issue, please try this sequence...note that, throughout the entire 4h15m process, your BB must remain directly connected to a known-good wall charger (not PC USB, not a cradle):
With the battery inside, connect your BB to the wall charger
Leave it alone for 2 hours, no matter what the LED or the display does
Remove the battery
Wait 15 minutes
Insert the battery
Wait another 2 hours, no matter what the LED or the display does
This has been known to "kick start" some BBs.
It is also possible that your battery or BB has experienced a test, this sequence is needed:
Obtain an known good and already fully charged additional battery...use it in your BB and see what happens
Obtain access to a known good and identical BB...use your battery in it and see what happens
The results of this will indicate if it's your BB or your battery that has the problem. Note carefully please that "new" and "know good" are not necessarily the same things. While rare, a "new" battery certainly could be defective. Rather, the simplest (and least costly, btw) method to conduct this test is to find someone with an identical BB who has no batteries and see what happens.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup here for an article with instructions.
Join our BBM Channels
BSCF General Channel
PIN: C0001B7B4   Display/Scan Bar Code
Knowledge Base Updates
PIN: C0005A9AA   Display/Scan Bar Code
Read More: The other 2 answers