LB1 High performance Laptop Battery for IBM ThinkPad T410s P/n: 51J0497 FRU 42T4690 Battery Type: Li-ion; Capacity: 3600mAh/39Wh; Cells: 6-cells; Voltage: 10.8V. Premium Grade A cells ensures peak performance and reliability. Operation time depends on the capacity of the battery, laptop settings, power consumption of equipment, and how you use it. CE-/RoHS-/FCC- Certified and Built-in circuit protection ensure both safety and stability. Live Support Mon-Fri 4am-8pm PST | Sat-Sun 8am-5pm PST | 18 Months Hassle-Free Warranty. Compatible with: IBM ThinkPad T410s 51J0497 FRU 42T4690