PB-21shi : 7.2v 1100mAh NiCd insert for Kenwood PB-21h
The PB-21shi is a 7.2v 1100mAh long-life replacement rechargeable NiCd insert for the Kenwood PB-21H battery pack (larger wraparound model). Goes inside the PB-21H casing. This fits on the TH-21A, TH-21AT, TH-21E radios. You will need to open your PB-21H, remove the old insert, and solder this new insert into place.