The warranty Period for all Lenovo parts like batteries, stylus, digitizer pens, etc are limited to 12 months unless otherwise specified. This means that Lenovo will provide warranty service without charge for batteries, stylus, digitizer pens, etc. during the warranty period. Warranty service may not be available in all locations and may differ from location to location. For accessory, be sure to retain your proof of purchase and packing material. They might be required to receive warranty service.