Destek
Newbie level 1
I am testing a small hand-held transmitter for my company. It transmits a signal on 433.92 Mhz and uses a button battery.
WHen you push a button an LED lights up and this LED is supposed to also let you know the battery is good. If it doesn't light up then the battery is dead and you should replace it.
So far so good.
The battery is a CR2450 (3V .620 AH) and it looks like it will easily last 2 months - which is just OK - not great though. When idle the unit draws about 20 microamps and when transmitting it will draw just under 20 milliamps.
I ran some tests today using a power supply, not a battery. I found that the unit would actually stop transmitting when the voltage was lowered to 2.15 volts.
The LED, however will continue to light up until the voltage is dropped all the way down to 1.92 volts.
Now I am using a power supply. I set the PS current limiter to the lowest I could to keep the transmitter operating at the full 3 volts.
My question is: is my test valid and do I really have a problem? Based on my test it would seem that a battery nearing the end of its life would continue to indicate as operational when, in fact, it isn't. Will an actual battery behave differently from my power supply - invalidating my test?
Thanks for any advice you can give me!
WHen you push a button an LED lights up and this LED is supposed to also let you know the battery is good. If it doesn't light up then the battery is dead and you should replace it.
So far so good.
The battery is a CR2450 (3V .620 AH) and it looks like it will easily last 2 months - which is just OK - not great though. When idle the unit draws about 20 microamps and when transmitting it will draw just under 20 milliamps.
I ran some tests today using a power supply, not a battery. I found that the unit would actually stop transmitting when the voltage was lowered to 2.15 volts.
The LED, however will continue to light up until the voltage is dropped all the way down to 1.92 volts.
Now I am using a power supply. I set the PS current limiter to the lowest I could to keep the transmitter operating at the full 3 volts.
My question is: is my test valid and do I really have a problem? Based on my test it would seem that a battery nearing the end of its life would continue to indicate as operational when, in fact, it isn't. Will an actual battery behave differently from my power supply - invalidating my test?
Thanks for any advice you can give me!
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