So hey, I literally just made an account to follow up on this for you. I just had a suspected counterfeit die on me after only a half year of use and well under 300 charge cycles. Just flat out died.
I'm very familiar with PSP systems and their components- and I can say for sure the only one in that group I know FOR SURE is a legitimate Sony battery is the one second from the left in the first pic. (The pic showing the labels)
I'm pretty upset about it actually, but hey
what can ya do...
In the picture I uploaded the middle battery is 100% Official. Note the blue circle "recycle" symbol and the font/graphic. The far left battery is the sneaky counterfeit- and the right side is an obvious 3rd party battery. Be careful people!
The only way you can tell is with a keen eye... I reported the seller because they really laid down the "these are Official unused batteries yada yada" shtick in their description. Burned me... it just flat died on me tonight while I was playing Doom. Heck, the obvious 3rd party battery hasn't even died like this on me- but they don't allow a proper sleep mode before the battery fully dies. Still- at least it works!!!
Also, hey everyone... I've used the site for a longggg time but I never made an account.