How to add wireless charging to Samsung Galaxy S4 mini
Wireless charging adoption may seem hype-driven, but it's actually an openness to technological advancements.
- The feature is becoming more widespread in newer phones, yet still absent from lower-end and mid-range models.
- This guide focuses on implementing wireless charging on the Samsung Galaxy S4 mini, specifically with a hidden charging pad under its cover, preserving features like NFC and USB port functionality.
Step 1 | Preparing the wireless charging pad, in order to fit inside the back cover
Be careful when handling the internal components — risk of damage.
- Disassemble the wireless charging pad to its bare minimum dimensions.
- Rubber heat diffuser, located near the back, must be removed for optimal performance.
Step 2 | Adding connecting wires to the wireless charging pad
Identify the wire terminals on the wireless charging pad.
- Apply a thin layer of solder to each terminal.
- Solder the flexible wire to both the positive (+) and negative (-) terminals.
Step 3 | Gaining access to the internal USB board
Follow steps 1-8 of the USB Board Replacement Guide to access the USB board.
Step 4 | Soldering wireless charging pad onto the USB port
Connect the wireless charging pad connection to CN2 on the USB port.
- Secure the wire to the ground on the USB port.
Any part of the external metal surface can be used for grounding, but ensure it's securely connected to avoid electrical issues.
Step 5 | Altering back cover to fit the wires inside the phone
Insert a screwdriver and carefully pry open a gap in the rear casing near the battery compartment, creating space for the wires.
Step 6 | Placing the back cover once more
Follow steps 7-3 of the USB board replacement guide in reverse order.
- Place the back cover while ensuring the charging pad wires fit through the pre-drilled holes.
Step 7 | Placing wireless charging pad to keep NFC functioning
Position the wireless charging pad about 1 inch off-center to ensure proper alignment with the NFC chip within the battery.
Step 8 | Booting the phone to check everything is working
Galaxy S4 mini may still boot even if wireless charging pad is not properly aligned or installed.
- Ensure the wireless charging pad is correctly positioned on the device.
- Check for any signs of physical damage to the phone's charging contacts or the charging pad itself.
- Reinstall the wireless charging pad and try charging the device again.