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[email protected]. KJ-KayJI Surface Power Supply 44W 15V 2.58A Compatibility: Surface Pro 3 Tablet, 2014, i3-4020Y / i5-4300U / i7-4650U Surface Pro 4 Tablet, 2015, m3-6Y30 / i5-6300U /i7-6650U Surface Book, 2015, i5-6300U / i7-6600U / i7-6600U Surface Book 2 15-inch and 13-inch, 2017, i7 / i5 Surface Laptop, 2017, i5 7200U / i7 7660U Surface Pro,Surface Pro 5, 2017, m3-7Y30 / i5-7300U / i7-7660U New Surface Go Tablet, 2018,10-inch Frequently Questions: *What is the advantage of 44W better than 65W? First of all, their compatibility is the same, the 65W compatible computer model 44W is also compatible. Secondly, Economic and Efficient! Save more than 65W,compared with 36W, the charging speed of 44W will be faster. Finally, the weight of 44W is only half of 65W, so this is a single excellent Surface power charger *Is the compatibility in the ads true? So many models are compatible? Yes, this is the result of our professional testing, as long as it is the same as the models in the ad, it is compatible and charging is fast. * Why is it hot? Is it overheating? Is it safe? When the power supply is working/charging, it will become warm/hot sometimes, depending on battery percentage and the working mode of the device. It is not overheating, as long as the outer material is not melting or spreading abnormal odor. We cooperate with TUV approved partner, guaranteeing material safe. Attention *Don't expose to liquids *Don't disassemble *Avoid dropping *Avoid extreme temperatures It is normal that has certain temperature increasing during use.