How to measure the voltage of a silver - oxide battery with a multimeter?
Experience in using silver oxide batteries:
For button batteries with a measured voltage of 1.5V or 3V, after charging once, the watch can work for several months.
As for how to charge it, if the charging voltage is 1V higher than the battery voltage, and the battery gets too hot, leaks liquid or swells, it will be useless. It is appropriate that the battery gets slightly warm. If the outer shell of the battery is cold, it means that the battery cannot be charged. I have an electronic watch. After it stops working, I take out the battery for charging, and the battery can be used for two years. When the battery needs to be charged every month, it should be discarded. For button batteries with no electricity, if the voltage is 1.2V, they can be charged and used. Use an old mobile phone charger, cut off the plug, connect two diodes in series to step down the voltage, and charge the button battery with a voltage 0.5V higher than the original battery according to the need. Use a wooden clothes clip to clip the two wire ends for charging.
What type of multimeter should be used to measure the voltage of button batteries?
The battery has positive and negative poles. The larger flat bottom is the positive pole, and the small circle in the middle is the negative pole.
Do not use a digital multimeter to measure.
Why?
A digital multimeter picks up data by amplifying weak signals. When measuring, the battery supplies only a weak current and has a high internal resistance. For a battery that is actually already useless, the measured voltage value is still close to the usable voltage. In fact, the battery cannot support the micro-current operation of the watch. So, this voltage is actually false information, and the measurement result does not match the actual situation of use.
When using an analog multimeter to measure button batteries, the working current flowing through the micro-filament of the meter head is much larger than the power consumption of the watch. In this case, the measured battery power is accurate, and the measured voltage data will not decrease after the battery is installed in the watch. For batteries with a voltage of 1.2V, the watch will not run because a pointer watch cannot operate without a certain amount of power.
