LifeSpan EL2000 - Manual (Page 42)

Battery Replacement
The console comes with a battery to keep the date and time accurate when the power is unplugged.
The date and time is required to save exercise data that is date and time stamped. When the battery
is running out and needs to be replaced, the date field on the console will begin to flash.
Check the LifeSpan web site for information on replacing this battery at www.lifespanfitness.com