I have a malfunctioning monitoring device at work that requires a 3.7 volt lithium battery. I am not sure yet whether the battery is bad or the device is bad....here's the question...:think:

I tested out the device with a regular 1.5 volt battery and nothing happened...does this device actually need a 3.7 volt battery to operate or is the bigger battery needed simply for longer life?

Test voltage level on the 3.7 volt battery
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Test voltage level on the 3.7 volt battery
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Are you saying the device likely needs 3.7 volts just to turn on? If so, that answers my question.

Are you saying the device likely needs 3.7 volts just to turn on? If so, that answers my question.


Likely needs the full voltage.....or closer than 1.5V you tried.

Likely needs the full voltage.....or closer than 1.5V you tried.

I'm "shocked" by your response, but I'll try it...:laugha:

Usually rated +/- 5% on voltage.....not +/-60%....you need to be pretty close on the voltage to turn on.

if you are going to use a "Different" battery source make sure you are on or below in amps...or you risk frying it

yes ........... needs the higher voltage :uhuh:

3.7 volt AA batteries are tough to find, let me tell you.

The current will increase in the electronics if the replacement battery is higher then 3.7 volts.
I would not be as concerned if the replacement battery max. current is higher then that of the original battery knowing the following:

I = V/R

and since R(resistance) and V(voltage) are a fixed value the I (curremt) will be the same regardless of the max battery current is greater then the original.
If you get a battery that has a current ""very much below"" the original the device will not worK
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