Can battery be changed on Polder instant read meat thermometer? If so,How?

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https://www.ehow.com/how_7684637_use-polder-meat-thermometer.html

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These thin thermometers can be inserted into the meat for around 30 seconds to get an accurate reading (avoid the bone).

Sounds like the on/off switch is bad. The simplest solution is to remove
the battery to turn it off.

Here's the general rule of thumb for cooking temperatures for meats. Remember though, you cannot leave the thermometer inserted in the meats while cooking. It's only for Instant Read.Always insert it in the thickest part of the meat away from any bobes.

BEEF RARE 14=30 - 140F

Polder timer manuals appear on following link:
http://www.polder.com/productinfo.html
Typical 891 manual:
http://polder.com.p2.hostingprod.com/images/instructions/891_instructions.pdf

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For a price, expert works with you while you work on timer or any do-it-yourself project.
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Timer is not identified for certain.
1) Some Polder timers have in-oven thermometer, and others say not to use thermometer inside oven.

2) The 12453 dual-sensor says inside-oven is ok

3) The 894 dual sensor says inside-oven is ok

4) TM360 dual probe says inside-over is ok

Polder timer manuals appear on following link:
http://www.polder.com/productinfo.html

Take a moment and vote on answer:
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

It is possible that the therrmometer has over shot the limit set on it .It can be spoiled because the hat was in direct contact with the probe and has resulted in the failure of the unit.

The two red wires more than likely go to the speaker on the back
cover. There is usually a small dab of solder where the wires go.
Re solder the two wires to the speaker and don't worry about which
wire go to witch dab of solder. The speaker is not polarity sensitive.

http://polder.com.p2.hostingprod.com/images/instructions/604_instructions.pdf