Okay, so I recently got a PSP, and the battery it came with (a stock battery, too), was broken, and the PSP was not recognizing it. So I bought a new battery, this one. It arrived today, and I put it in the PSP. It worked for a decent while. The whole while I had my adapter plugged in my PSP; I also had the PSP plugged into my PC. I put upgraded the PSP to 6.20 PRO, and whatnot, and eventually I unplugged the adapter, and left the PSP plugged in my computer. I left only to come back and find the PSP completely off, and refusing to turn on, even with the computer plugged in, and there is no orange charging light. However, when I plugged in the adapter, the orange light turned on. But still, if I unplug the adapter, the PSP turns off, and it gives nothing in Battery Information (Darn, I wish I checked what Battery Information looked like before this happened). The PSP itself acts as if there is no battery, or the battery is broken, but the charge light comes on if I plug the adapter in. Furthermore, when I checked the battery with my multimeter it read ~4.25 volts, so it seems to be overcharged (scary thought!). The battery gives out at least 250mA, but my multimeter can only measure a max of 250mA (it's one of those old analog ones). So, what gives? My thoughts are that the battery is cheap, and although advertised as being 3.6V and having 2600mAh, in reality the voltage is higher, with the current being somewhere in the middle so that it has the same power that a battery of the above specifications otherwise would... Or something along those lines. In any case, by the fact that the battery is giving 4.25 volts, I assume the PSP is turning off due to some safety measure, and although the battery still works as a battery ought, the PSP refuses the connection so as not to be overvolted. So, does anyone here have thoughts?