Lumenok Replacement battery for Nocks 2-Pack. They can be used in the following Lumenok models: the Lumenok Signature the Lumenok GT the Lumenok H and the Lumenok X. Specifications for Lumenok Replacement battery for Nocks 2-Pack: Manufacturer: Lumenok Battery Quantity: 2 Features of Lumenok Replacement battery for Nocks 2-Pack: The Lumenok RB is a 2 pack of (BR-435) replacement batteries for your Lumenoks. Each Weighs 12 grains. The Lumenok RBS (BR-425) is the Lumenok replacemant battery that comes standard in our Crossbow Lumenoks It weighs 8 grains and can be substituted in our Lumenok Signature GT and Lumenok H as a lighter weight alternative A slight reduction in brightness will result. Package Contents: Lumenok Replacement battery for Nocks 2-Pack Lumenok RB: Replacement battery for Nocks 2-Pack