I am looking for a external battery for my PSP2000 and just found 2 on the Intenet: http://www.tinydeal.com/2400mah-exte...w--p-8025.html and http://www.tinydeal.com/2400mah-exte...w--p-2132.html , but I don't know so exactly the difference between them and which one is better? What do you think about them? Anyone can offer me some professional suggestions? Thank you in advance.