Rechargeable NiMH "AA" battery for use in the IRN-10, IRH-15c, IRH-56, IRB-56, IRB-10c, IRC-51, IRC-56,IRC-22, 320UPR and 325UPR. These are specially prepared to trigger the safety interlock that stops these transmitters and receives from attempting to recharge regular (non-rechargeable) batteries. Priced each.