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Yes, the Samsung 45W charger can be used with the Motorola Moto G4 or similar phones, but there are some compatibility considerations and limitations to keep in mind: 1. Charging Protocol Support The Samsung 45W charger uses PPS (Programmable Power Supply) and USB Power Delivery (USB PD) protocols. If the Moto G4 or any Motorola phone does not support these protocols, it will revert to standard charging speeds (e.g., 5V/2A or 10W). Moto G4 Compatibility: The Moto G4 does not support USB PD, so it will charge at its maximum supported rate, which is typically 10W or 15W (depending on the model). 2. Maximum Charging Power Even if the Samsung charger is capable of 45W, the Moto G4 is limited by its hardware and will not draw more than its maximum supported wattage. No Motorola phone in the Moto G4 series supports 45W charging, so the extra power capacity of the charger will not be utilized. 3. Cable Requirements The Samsung 45W charger requires a USB-C to USB-C cable for optimal performance. If the Moto G4 uses a micro-USB port, you'll need a USB-C to micro-USB adapter or a cable that supports this connection, which may reduce efficiency. 4. Heat and Safety Concerns The charger will only supply the amount of power requested by the phone, so there’s no risk of overpowering or damaging the device. However, using a high-powered charger on a device not optimized for it can cause slightly higher heat generation during charging. 5. Fast Charging Compatibility Motorola phones often use TurboPower charging, which is proprietary. While TurboPower can sometimes work with USB PD chargers, it’s not guaranteed that the Samsung charger will trigger fast charging on Moto G4 devices. Summary You can safely use the Samsung 45W charger with your Motorola Moto G4, but: It will not utilize 45W charging. Charging speed will be capped at 10W or 15W, depending on the phone’s capability. You may need a USB-C to micro-USB adapter or cable. Fast charging may not work due to different protocols (Samsung's PPS vs. Motorola's TurboPower).
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