Using a multimeter to measure silver oxide battery voltage
The button style small white bright batteries we commonly use are made of silver oxide in authentic batteries, and lithium ions are used instead of fake ones, which you cannot distinguish. Some of them are genuine, but some of them are old products in the hands of dealers. The batteries that are close to or have expired will not be used when they reach your watch or erhu tuner.
1. Experience in using silver oxide batteries:
A button type battery with a measured voltage of 1.5V or 3V can still work for several months after being charged once.
How to charge, if it is higher than the battery by 1V or too high, it will become useless due to overheating, fluid swelling, and swelling. It should be slightly hot, as the casing is too cold to be powered on. I have an electronic watch that I take out to charge after shutting down, and it can still be used for two years. When I charge it every month, I throw it away. Any dead button battery can be charged at a voltage of 1.2V and can be used. I use an old phone charger, cut off the plug, and use a two board tube to reduce the voltage. Then, I charge the button battery with 0.5V higher than the original battery as needed. Use a wooden clip to hang clothes and clamp the two wire ends for charging.
2. What type of multimeter should be used to measure voltage for button type batteries?
The battery has positive and negative electrodes, with the larger flat bottom being the positive electrode and the smaller circle in the middle being the negative electrode.
Do not measure with a digital meter ⚠️ Why?
The digital watch picks up data amplified from weak signals. During measurement, the battery only supplies weak current and has a high internal resistance. The already scrapped battery still presents a voltage value that is suitable for nearby use. In reality, it can no longer support the micro current operation of the watch, so this voltage is considered false information and does not match the measurement and use.
When measuring a button type battery with a pointer multimeter, the working current flowing through the micro wire of the meter head is much greater than the power consumption of the watch. In this case, the measured battery level is real and will not decrease the measured voltage data after being installed on the meter. Any battery with a voltage of up to 1.2V will not turn when installed in a watch, because a pointer watch cannot operate without a certain amount of power.
