then install the new one(s) with the positive (+) side(s) facing up.

Warning:

Always dispose of old batteries promptly and properly.

Never burn batteries.

Keep batteries out of reach of children. Swallowing a battery could be fatal.

Caution: Be sure to keep the two main batteries in the battery com- partment while replacing the back-up battery.

4.Replace the cover, then reinsert and tighten the screw.

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Radio Shack EC-291 owner manual Always dispose of old batteries promptly and properly