PSP external battery pack issue

[*o*]

I bought the 3800mah external battery pack and when i connect it to my psp and charge it my psp make a high pitched noise...i then removed it from my psp and charged it by itself so it finished charging but when i plug it into my psp and nothing happens if i go into battery info it says it is going off the internal power source so its not working.....if anyone knows what the issue is please tell me...oh and i bought it off lik-sang what is there return policy

[Plod]

Lik-Sang's returns policy can be found here:

http://www.yesasia.com/?/master.php?n...es&inc=tos.inc

Plod