Change Battery On 2004 Honda Accord LX Key Fob October 3, 2016Honda, Key FobCR1616 3V, Duracell Battery, Energizer battery, Honda Accord 2004, Honda Key Fob, Key fob battery, Philips Screw driver . No Comments, 288 views After 12 years, the battery on our 2004 Honda Accord LX key fob was dead. The battery part number is CR1616 3V. We need a small Philips head screw driver to remove the cover. Make sure the battery is inserted correctly with + and – side.