VSKA1003 Features: * Safe lithium-ion technology * Smart technology communicates accurate information to the computer * No memory-effect * Overcharge protection built in * 6 Cells * Provides 5200mAh of capacity * Lithium-ion rechargeable * Replaces the following TOSHIBA part numbers: PA3107U, PA3107U-BAS, PA3107U-1BRS * Fits the following TOSHIBA models: TOSHIBA SATELLITE 1550, TOSHIBA SATELLITE 435, TOSHIBA SATELLITE 420, TOSHIBA SATELLITE 415, TOSHIBA SATELLITE 4100, TOSHIBA SATELLITE 4090, TOSHIBA SATELLITE 4080, TOSHIBA SATELLITE 4070, TOSHIBA SATELLITE 4060, TOSHIBA