MOTOROLA ULTRA CAPACITY LITHIUM ION BATTERY FOR RDX ULTRA CAPACITY LITHIUM ION BATTERY REPLACES ANNUALLY FOR BEST RELIABILITY. 2400 MAH PROVIDES UP TO 26 HOURS OF SERVICE (ESTIMATED ONLY, WITH “BATTERY SAVE” FEATURE “ON” BATTERY CAPACITY WILL DIFFER DEPENDING ON THE RADIO MODEL AND/OR REGION). ALL BATTERIES ARE EASY TO CHARGE AND SLIDE ON TO LOCK SECURELY.