It takes one CR2016: a coin battery, about the size of a nickel.
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You’ll need: #00 jeweler’s screwdriver
Slide or unscrew the little battery door.
Take out the old one and put the new one in matching the “+” mark.
Close the door and switch it on.
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A new battery usually lasts about 2 years in this device.
That’s around October 2028.
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It takes CR2016, a coin battery.
Yes. DL2016, ECR2016, 5000LC are the same battery with other names.
Usually about 2 years, depending on how much you use it. Most devices warn you when it gets low.