ATC high quality Li-ion Battery Fit IBM ThinkPad R400 7443, Thinkpad R400 Series, ThinkPad R61 7732, ThinkPad R61 7733, ThinkPad R61 7734, ThinkPad R61 7735,compatible PN.42T5225,42T5227,42T5229,42T5262,42T5264,41U3197 brand new 100% Compatible - Will not void your original warranty Tech Rover&trade; Quality product with 30-DAY Worry-Free Return Policy Brand New High output Battery All Tech Rover&trade; branded items carry a 1 year warranty against manufacturer defects.