Rechargeable NiMH battery pack Compatible with Survivor & Knucklehead flashlights This Rechargeable NiMH Battery Pack is a replacement or spare for the one that comes with Streamlight Survivor and Knucklehead model fire and rescue flashlights. The battery is compatible with the Knucklehead Flood, Knucklehead Spot, Knucklehead Haz-Lo Flood, Knucklehead Haz-Lo Spot, and Survivor models.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }