DENAQ 6-Cell 58Whr/5400mAh Li-Ion Laptop Battery for IBM THINKPAD X30, IBM THINKPAD X31. Replaces IBM/LENOVO Parts 02K7039, 02K7040, 08K8035, 08K8036, 08K8039, 08K8040, 08K8045, 08K8048, 08K8049, 92P1094, 92P1096.