14.4-Volt 3300 mAH NIMH Replacement Battery For iRobot Roomba Discovery 400 / 4000 Series Robotic Vacuums, P/N 4905
Charges up in 3 hours with Roomba APS battery charger
Compatible with both Roomba 400/4000 Series including Roomba Original, Roomba Pro, Roomba Pro Elite, Roomba Dirt Dog, Roomba Discovery, Roomba Discovery SE, Roomba Red, Roomba Sage, and Roomba Scheduler
Easy to install - No need to disassemble the old battery pack to replace the cells
NIMH High Power 14.4V 3000mAh (3Ah) rechargeable replacement APS battery
Max Alkaline C Battery provides a long lasting power source
for such common workplace devices as calculators, pencil sharpeners, cameras, flashlights and portable tape recorders. Batteries are date coded and 100 percent mercury free.