HQRP 4-Pack Coin Lithium Battery for CLK320 1999 2000 2001 2002 2003 2004 2005 Transmitter Key Fob Remote Shell Case Cover Smart Key Keyless FOB + Coaster HQRP&reg; Four Lithium Batteries plus HQRP&reg; Coaster; Battery Voltage: 3V; 60 Days warranty!