00HW002, 00HW003, ASM SB10F46440, FRU 00HW002, ASM SB10F46441, FRU 00HW003, SB10F46440, SB10F46441. Lenovo ThinkPad X1 Carbon Gen 3 Ultrabook 2015 (Work with 2015 Series only). Tablet battery has 6 months warranty, the laptop battery has 12 months warranty.
eBay