2. Clean or Replace the Charger Connector
Dirty or loose charger connectors can interfere with the power flow. Cleaning or repairing the connector can help resolve the charging issue.
How to Do:
- Use a small brush or cotton swab slightly soaked in alcohol to clean the charger connector on your phone. Be careful not to let any liquid get into your phone.
- If the connector is damaged, you need to replace it with a new one.
3. Use 3.6 Volt Zener Diode for False Charging
False Charging is a situation where the phone shows a charge mark (such as a lightning bolt icon on the battery or an increasing percentage), but the battery is not getting a charge, so the battery percentage does not increase, it can even decrease.
This can happen due to a malfunction in the charging circuit that makes the phone incorrectly detect charging.
The use of a 3.6 Volt Zener Diode is a way to deliver power directly to the battery, bypassing a problematic charging circuit. A Zener Diode is a special diode that allows an electric current to flow in the opposite direction if the voltage exceeds a certain limit (in this case, 3.6 Volts).
How it Works (Requires Expertise and Scheme):
- You need to find the right point on the phone’s motherboard to do direct charging. This is usually in the diagram scheme of the phone as per your model.
- Connect the Zener Diode 3.6 Volt in series between a power source (such as a charger or external power source) and the phone battery. Make sure the Zener Diode polarity is correct. The Zener Diode’s anode (positive foot) must be connected to a power source, and the cathode (negative leg) must be connected to the positive (+) terminal of the battery.
- The Zener Diode will keep the voltage coming into the battery no more than 3.6 Volts, preventing overcharging and damage to the battery.
This is an advanced method and can damage the phone if not done correctly. It should be done by an experienced technician.
4. Check and Replace the Battery
If the previous steps didn’t work, it may be the battery problem. An old or damaged battery may not be able to receive or store power properly.
How to Do:
- Get a new battery that is original or of good quality according to your phone model.
- Replace the old battery with a new one.
- Try charging your phone and see if the problem is resolved.
5. Check the Voltage of the Battery Connector with a Multimeter
Checking the voltage on the battery connector can help to know if there is a problem with the charging line.
How to Do (Need Tools):
- Use a multimeter set to DC voltage measurement mode.
- Attach the multimeter probe to the positive (+) and negative (-) terminals on the battery connector on the phone’s motherboard.
- Check that the rated voltage is in the range of 1.5 to 3.7 Volts. If the voltage is outside this range or there is none at all, there is a problem with the charging line.
6. Check the Charging Line
If there is no current on the battery connector, there may be disconnected or damaged components in the charging line.
How to Do:
- You need a schematic diagram for your phone model. This scheme shows the charging path and the position of the components.
- Use a multimeter to check the continuity of the charging line and components.
- Find the damaged component and replace it with a new one. It requires special skills and tools.