KNB-33L Li-ion Battery Pack for Kenwood Radio TK-3180K TK-5310GK TK-5310K Titan BRAND BATTERIES - 18 MONTH WARRANTY Titan Brand Two Way products are 100% compatible and meet or exceed OEM Specifications 7.4V 1800MAH Li-ION High impact ABS and Polycarbonate plastic polymers for ruggedness. TITAN BRAND PACKS Only use Highest Grade Cells