Z-Bolt Rechargeable Batteries for High Discharge Flashlights Weapon Lights & Illuminators 2 Pack. The battery PCB safety circuit prohibits overcharging and heat build up - but offers high discharge power when needed and superior device operating run times. Specifications for Z-Bolt Rechargeable 18650 Batteries for High Discharge Flashlights Weapon Lights & Illuminators: Manufacturer: Z-Bolt Color: Black Battery Quantity: 2 Battery Capacity: 3500 mAh Power: 3.7 volts Package Type: Box Battery Type: 18350 Lithium Ion Battery Chemistry: Lithium Ion Features of Z-Bolt Rechargeable 18650 Batteries for High Discharge Flashlights Weapon Lights & Illuminators Positive Thermal Coefficient (PTC) Design Cells Prevents Excessive Current During Discharges Prevents Excessive Current During Charges Pressure Relief Venting Functionality Prevents Battery Cell Overheating Package Contents: Z-Bolt Rechargeable 18650 Batteries for High Discharge Flashlights Weapon Lights & Illuminators 1 pc Paper Carton 1 pc Plastic Battery Storage Case 2 pcs Z-Bolt 18650 Lithium Rechargeable Battery Cells Z-Bolt BATTS-2x-18650: Rechargeable 18650 Batteries for High Discharge Flashlights Weapon Lights & Illuminators 2 Pack