Lathem® time Optional backup battery for 7000e totalizing time recorder Optional Backup Battery for 7000E Totalizing Time Recorder, 24-Hour UPS Calculates worked time between punches and accumulated totals for up to 50 employees or jobs. Works with all pay periods—or set to job mode for accurate costing information. Automatic print alignment and sensing of front and back of card eliminate operator mistakes. Automatically adjusts date and daylight savings. Internal lithium battery maintains the time, card totals and program settings for up to five years without power.