Amazon.com: Nextgen Single Transmitter Battery for 433Mhz Remote Extender : Electronics
Amazon.com: Oceanic Transmitter Battery Kit for the OC1, OC1-LE, VT Pro, VT3, VT4.0, VT4.1, Atom, Atom 2.0, Atom 3.0, Atom 3.1, Datamask and Aeris Compumask Scuba Diving Computer : Electronics
Super Extended Life Lithium Transmitter Battery Compatible with Digitrak & Ditchwitch Sonde | Advanced Tool & Equipment