Battery life:

Operating batteries (at 25°C/77°F)

Approx. 1200 hours; When data is continuously displayed without Backlight.

Approx. 300 hours; When data is continuously displayed with Backlight for 2 minutes per hourly use.

Approx. 270 hours; When data is searched for 5 minutes and displayed for 55 minutes per hourly use and Backlight is on for 2 minutes per hourly use.

Approx. 1.5 years; When turned off and the clock is running.

Memory backup battery

Approx. 5 years (if operating batteries are replaced promptly when exhausted)

Approx. 1 year (if operating batteries are exhausted or not installed)

Weight: Approx. 120 g (0.27 lb.) (Including batteries)

Dimensions:

Open: 139.0 mm (W) × 174.7 mm (D) × 9.5 mm (H)

5-15/32" (W) × 6-7/8" (D) × 3/8" (H)

Closed: 139.0 mm (W) × 89.5 mm (D) × 13.7 mm (H) 5-15/32" (W) × 3-17/32" (D) × 17/32" (H)

Accessories: 3 lithium batteries (installed), operation manual

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Sharp El- 6890 Battery life Operating batteries at 25C/77F, Approx .5 years When turned off and the clock is running