Make sure to turn off USB charging support in the VSH recovery menu if you're using it - charging via USB and the DC barrel jack at the same time can PERMANENTLY DAMAGE this battery: it does not have overvoltage protection.

Note: Older prints may be mislabelled as 2400mAh - this is incorrect, as the the cells themselves (the internal battery inside the PSP battery shell) are only 800mAh despite being mislabeled by the manufacturer as 2400mAh.