BATTERY IBM THINKPAD X20 X21 X22 X23 X24 SERIES 02K6651 ONCORE

4000mAh Lithium Ion Laptop Battery increase your mobile productivity by taking along a fresh, fully charged Oncore battery. A ready spare can be easily swapped in to keep the power flowing, making unplugged all-day computing a reality. For extra convenience and mobility, enjoy a backup battery at home or work. Or keep one in your carrying case to double your battery life when traveling.