VSKA1042 Features: * Safe lithium-ion technology * Smart technology communicates accurate information to the computer * No memory-effect * Overcharge protection built in * 6 Cells * Provides 4400mAh of capacity * Lithium-ion rechargeable * Fits the following SONY models: SONY VAIO PCG-V505, SONY VAIO PCG-Z1 Specifications: * Replaces the following SONY part numbers: PCGA-BP2V, PCGA-BP4V