Lenovo Ideapad 45W 20V 2.25A 4.0*1.7mm Laptop AC Adapter Charger 100% Original

Key Specifications:Output Voltage (V): 20V (This is the standard voltage for most modern Lenovo laptops, including IdeaPads).Output Current (A): 2.25AOutput Power (W): 45W (Calculated as 20V * 2.25A = 45W).DC Connector Size: 4.0mm (outer diameter) x 1.7mm (inner diameter).Claimed Authenticity: “100% Original”Analysis & Important ConsiderationsThis 45W charger is a genuine, lower-power option for many Lenovo IdeaPad models, particularly thinner and lighter laptops or ultrabooks that are more energy-efficient.1. Compatibility with Your Laptop: This 45W charger is likely compatible with a specific subset of Lenovo laptops designed for it. However, you must check your specific laptop’s requirements.Check the Label on the Bottom of Your Laptop: Look for “Input: 20V” and see if it lists a current (A) or power (W) requirement. If it says anything up to 45W, this charger is perfect. If it requires 65W (like the previous charger we discussed), this 45W charger may not be sufficient.2. What Happens If You Use a Lower-Wattage Charger? Using a 45W charger on a laptop that came with a 65W charger can lead to several issues:Slow Charging: The battery will charge very slowly, if at all.Discharging Under Load: If you are using the laptop for demanding tasks (gaming, video editing), the laptop may draw more power than the 45W charger can provide. This will cause the battery to drain even while plugged in.Performance Throttling: The laptop might automatically reduce its performance (slow down the CPU/GPU) to avoid exceeding the 45W power limit.Error Messages: You may get a “Connected, not charging” message or a warning that “The wattage of the connected AC adapter is unrecognized and less than the recommended.”3. Connector Size: The 4.0mm x 1.7mm round connector is a standard size used by Lenovo for many of their devices. It is different from the proprietary rectangular “yellow tip” connector, confirming that Lenovo uses multiple plug types.