Check the listing for details. 7.2v SportDOG FT-100 Replacement Battery for Remote Control Transmitter. Condition: New. Listed at 19.95 USD. Normal 0 false false false EN-US X-NONE X-NONE 7.2V Replacement Rechargeable Battery Pack for SportDOG FT-100 Remote Transmitters~ The Dimensions of This Battery (Using a Caliper) Are: 30.8mm Long x 21.4mm Wide x 14.5mm High ~ It is Hard to Find a 7.2v Rechargeable Battery Pack for these Remote Transmitters. And, When You Do, they are Often too Large for the Battery Compartment and the Back Panel of the Transmitter Cannot be Properly Put Back in Place. This 7.2v Rechargeable Battery Pack Will Fit Perfectly In the Battery compartment. ~ This Replacement Rechargeable Battery Pack Works Perfectly with & Fits Properly in the Following Remote Transmitters: SportDOG FieldTrainer SD-400 Transmitter SportDOG FieldTrainer SD-400S Transmitter SportDOG WetlandHunter SD-400CAMO Transmitter SportDOG YardTrainer SD-350 Transmitter / Handheld PetSafe Yard & Park PDT00-12470 Transmitter / Handheld PetSafe Stubborn Dog HDT11-13910 Transmitter / Handheld ~ New Rechargeable Battery Packs Need to Charge For a Full 24 Hours Prior to the 1st Use. ~ Please Feel Free to Ask Any Questions You May Have Buy With Confidence ~ 100% Positive Feedback Thanks for Looking! Matt