Nitecore IMR18650 for TM28 Concept 1. 3100mAH Protected Yellow. We love to pair it with the NITECORE TM28 EC23 and Concept 1 flashlights. Simply charge the IMR3100 batteries using the built-in charging capability in the TM28 or in a NITECORE i2 D4 SC2 or other compatible battery charger. With built-in overcharging and over discharge protection the IMR3100 is designed to last over 500 charge cycles. A 12 month free warranty period means you will never have to worry about this battery leaving you in the dark. Specifications for Nitecore IMR18650: Manufacturer: Nitecore Color: Yellow Battery Quantity: 1 Battery Capacity: 3100 mAh Power: 3.7 volts Length: 2.72 in Weight: 1.6 oz Package Type: Box Battery Type: 18650 Lithium Ion Battery Chemistry: Lithium-Ion Features of Nitecore IMR18650 NITECORE IMR3100 18650 3100mAh high capacity battery with outstanding performance Suitable for high-intensity LED flashlights like the NITECORE TM28 NITECORE Concept 1 and more Multiple protections with internal and external safety features Built in overcharge and over discharge protection to increase battery lifespan Designed to last over 500 charge cycles Package Contents: Nitecore IMR18650 NITECORE IMR3100 18650 rechargeable Li-ion battery Nitecore 6952506492220: IMR18650 for TM28 Concept 1. 3100mAH Protected Yellow