Nitecore NL1834 3400mAh Rechargeable 18650 Battery, Yellow, 6952506491506. Specifications for Nitecore NL1834 3400mAh Rechargeable 18650 Battery: Manufacturer: Nitecore Color: Yellow Battery Quantity: 1 Battery Capacity: 3400 mAh Power: 3.7 volts Package Type: Box Battery Type: 18650 Lithium Ion Bat