How to replace the battery of IC card water meter?

First of all, it depends on whether the ic card water meter, gas meter and heating meter originally used 3V lithium battery, 3.6V lithium battery or 6V or 7.2V lithium battery to determine the voltage. Secondly, it depends on the battery model, such as ic card water meter, gas meter and radiator. Common models of 3V lithium-manganese batteries: Cr123a Cr14505cr17450cr17505cr26500, etc. Common models of Ic card water meter, gas meter and radiator 3.6V lithium secondary battery: er14250mer14335mer14505mer17335mer18505mer26500m, etc. If two batteries are packed together, Battery model: 6V lithium-manganese battery pack: 2cr145052cr173352cr174502cr1 7505 ........................................................................................... M2er17335m ... Next, it depends on whether the battery is wired or wired with plug. If the battery is wired, use an electric soldering iron to weld the positive red wire of the battery to the wiring board of the circuit board. Wires with black lines or other colors are usually the negative electrode of the battery, and the wiring is switched to the negative terminal. It is best to have a plug, but the plug spacing should be the same as that of the original model, and the red and black wires must be in the same position, otherwise the circuit will be damaged by short circuit. Do you have an electric soldering iron if your battery has only two wires or different plug models? There is a way. Finally, you can cut off the old battery plug, connect the red core to red core and black core to black core, and wrap them separately. Install the battery, brush the water card, and the solenoid valve will open.