This SONY cell is a bit of a departure for me - IMR cells aside - as it is obviously a bare laptop cell, or possibly for power tool use, and has not been converted in any way for use in lights. So no protection circuit, no button, no aftermarket wrapping, and the stock wrap does not extend to the bottom of the cell. It is common for cells that are intended for use in packs to have an entirely bare base in order to make welding/soldering the cells together easier to do.
Description: 2SJ28 is a very special P Channel Vertical Field Transistor (VFET) used in SONY Class First Class-D Amplifier (Model: TA-N88(B). Its has a Vp rank code of KF-33 Mark on the part. The complimentary pair 2SK82 with the same ranking can be found in our store. The parts are guaranteed new, unused.
Features: Characteristic identical to Classic Triode Vacuum Tube.