Description
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Overview
The Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W is a genuine OEM replacement charger designed to provide dependable and efficient power for the Lenovo ThinkPad T420 laptop. Delivering 20V DC at 4.5A, it produces a maximum output of 90W, ensuring stable laptop performance while charging the battery simultaneously.
Designed specifically for the ThinkPad T420 4180-PRU, this adapter features Lenovo's round barrel connector and includes a compatible AC power cord. With universal 100–240V AC input, it is ideal for home, office, business, and travel use. Lenovo lists the ThinkPad 90W AC Power Adapter (Round Tip) as a compatible accessory for the ThinkPad T420 series.
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Price Table
| Product |
Price in Kenya (KSh) |
| Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W |
2,800 – 5,500 |
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Key Specifications
| Specification |
Details |
| Brand |
Lenovo |
| Adapter Type |
OEM AC Power Adapter |
| Output Voltage |
20V DC |
| Output Current |
4.5A |
| Output Power |
90W |
| Input Voltage |
100–240V AC |
| Input Frequency |
50–60Hz |
| Connector |
Lenovo Round Barrel Connector |
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Electrical Output Specifications
The adapter delivers regulated electrical output for dependable laptop performance and efficient battery charging.
Voltage (V): 20V DC
- Delivers a stable regulated 20V output for reliable laptop charging.
- Maintains consistent voltage throughout extended charging sessions safely.
- Matches Lenovo factory power specifications for maximum compatibility.
Amperage (A): 4.5A
- Supplies up to 4.5A current for efficient battery charging performance.
- Automatically adjusts current according to laptop power requirements.
- Supports dependable charging during intensive productivity workloads.
Wattage (W): 90W
- Produces 90W maximum output for reliable everyday charging performance.
- Powers the laptop while simultaneously charging the internal battery.
- Delivers efficient power transfer with minimal heat generation.
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Common Wattage Tiers & Use Cases
45W
- Suitable for compact notebooks and entry-level ultrabook computers.
- Ideal for web browsing, office work, and educational applications.
- Recommended for devices with lower overall power requirements.
65W
- Designed for mainstream ultrabooks and business productivity laptops.
- Supports multitasking, meetings, and everyday professional workflows.
- Commonly used by lightweight Lenovo notebook computers.
90W–120W
- Built for higher-performance ThinkPads and business-class notebooks.
- Supports systems requiring greater sustained electrical power output.
- This adapter belongs to the 90W Lenovo laptop charger category.
150W–240W+
- Intended for gaming laptops and workstation-class mobile systems.
- Designed for hardware with dedicated graphics and higher power usage.
- Not required for the Lenovo ThinkPad T420 4180-PRU.
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Input Specifications
Input Voltage
- Accepts worldwide input ranging from 100V to 240V AC.
- Suitable for homes, offices, hotels, and international travel.
- Eliminates the need for separate voltage conversion equipment.
Input Frequency
- Operates efficiently on both 50Hz and 60Hz electrical systems.
- Compatible with worldwide electrical infrastructure standards.
- Maintains dependable charging across different global regions.
Power Source
- Connects directly to standard AC electrical wall outlets.
- Efficiently converts AC electricity into regulated DC output.
- Provides reliable charging with excellent overall energy efficiency.
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Connector Types
USB-C Power Delivery (PD)
- Used by newer Lenovo laptops supporting USB-C charging technology.
- Automatically negotiates voltage for safe charging performance.
- Not compatible with this ThinkPad T420 adapter.
Barrel Connectors
- Uses Lenovo's round barrel charging connector for secure operation.
- Provides dependable electrical contact during daily laptop charging.
- This adapter uses the Lenovo round barrel connector.
Proprietary Connectors
- Used on selected Lenovo systems requiring dedicated charging ports.
- Designed to ensure correct electrical compatibility and safe operation.
- Not required beyond the round barrel connector used here.
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W FAQs
1. Is this adapter compatible with the Lenovo ThinkPad T420 4180-PRU?
Yes. It is specifically designed for the Lenovo ThinkPad T420 4180-PRU and delivers the required 20V 4.5A 90W output.
2. Does this adapter include a power cord?
Yes. The package includes both the 90W AC adapter and a compatible AC power cord.
3. Can I use this adapter with other Lenovo ThinkPad laptops?
Yes. It is compatible with other Lenovo ThinkPad models that require a 20V 4.5A 90W adapter with the same round barrel connector.
4. Does this adapter support worldwide voltage?
Yes. It supports 100–240V AC, 50–60Hz, making it suitable for international travel.
5. How do I verify compatibility before purchasing?
Check your laptop model, required output (20V 4.5A 90W), and connector type before ordering.
6. Does this adapter include built-in safety protection?
Yes. It features protection against over-voltage, over-current, overload, overheating, and short circuits for safe and dependable daily operation.
Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W Conclusion
The Adapter for Lenovo ThinkPad T420 4180-PRU 20V 4.5A 90W is a dependable OEM replacement charger that delivers stable, efficient, and safe power for your laptop. Featuring a 20V output, 4.5A current, 90W power rating, Lenovo round barrel connector, included AC power cord, and universal 100–240V AC input, it is an excellent replacement or spare adapter for Lenovo ThinkPad T420 users in Kenya.
