PB-21i : 7.2v replacement insert for KENWOOD PB-21
$ 21.95
The PB-21i is a 7.2 volt 350mAh replacement rechrgeable Ni-Cd insert for old KENWOOD PB-21 battery packs. You will need to open up your old PB-21, remove the original insert, and solder this new insert into place. Made of 6 x AAA cells welded together.