20V 4.5A 90W Laptop AC Power Adapter Charger, Square Yellow Tip Power Supply Replacement for Lenovo ThinkPad X1 Carbon 4th Gen 2016, Rescuer 14-ISK 15-ISK, OEM Part Numbers 45N0237, 45N0238, Universal

This 90W 20V 4.5A laptop AC adapter is a fully compatible replacement for Lenovo original power supply part numbers 45N0237 and 45N0238, specially built for ThinkPad X1 Carbon 4th Generation 2016 ultrabook and Lenovo Rescuer 14-ISK, 15-ISK gaming notebooks. It delivers stable constant DC output to fully meet the power demand of both business ultrabooks and gaming laptops, supporting normal boot, high-load operation and fast battery charging without insufficient power or unstable performance issues.

Designed with universal wide-range AC input (100-240V 50/60Hz), this charger works for US, EU, UK, AU and most global wall outlets, ideal for office, home and business travel use. Adopting premium built-in circuit chips, it integrates complete multi-protection systems including over-voltage, over-current, overheating and short-circuit auto power-off function, effectively avoiding motherboard burnout and extending your laptop service life during long-hour continuous use.

Equipped with standard Lenovo yellow square slim tip, the plug fits tightly into the laptop power port without loose contact, poor charging or flickering screens. The thickened anti-break power cord with reinforced strain relief reduces wear and tear from frequent plugging and unplugging. High-efficiency internal heat dissipation structure keeps the adapter cool even under long-time high-load gaming or office rendering tasks.

Fire-resistant ABS outer shell ensures safe daily use, with compact lightweight size easy to store in backpacks and laptop bags. Plug-and-play without extra driver installation, this power brick serves as an ideal backup or replacement charger when your original adapter is lost, damaged or aging, perfectly matching Lenovo ThinkPad and Rescuer series laptops with 90W square tip power requirements.