Black & Decker CST1000 Type 4 String Trimmer 12V 7Ah Battery - This is an AJC Brand Replacement This is an AJC Brand&#174; Replacement for a Black & Decker CST1000 Type 4 Cordless String Trimmer 12V 7Ah Lawn and Garden Battery Voltage: 12V (12 Volts) Capacity: 7Ah Terminals: F1