Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Price in Kenya

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A

KSh 3,360

Stock Status:

Condition: New

SKU : 9549M37

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Key Specifications

90W Lenovo-compatible AC Adapter Charger designed for the Lenovo ThinkPad T420 4178-57U.
90W power output (20V ⎓ 4.5A) provides stable and reliable charging for Lenovo ThinkPad business laptops.
Compatible with Lenovo ThinkPad T420 4178-57U and other ThinkPad T420 models requiring a 90W 20V adapter.
Lenovo Round Barrel Connector (7.9 × 5.5 mm) ensures a secure and dependable connection.
Universal AC input (100–240V AC, 50–60Hz) supports worldwide electrical standards.
High-efficiency switching power supply for stable voltage regulation.
Built-in protection against over-voltage, over-current, overload, overheating, and short circuits.
Durable construction suitable for business, education, office, and home use.
Ideal replacement charger for damaged, faulty, or misplaced Lenovo adapters.

Warranty: The warranty tendered hereunder, on the electronic product(s) sold under this invoice will be provided exclusively by their respective Authorized Agents/Distributors and are limited to the period indicated from the date ofyour invoice, except otherwise mentioned as per the warranty conditions as carried along with the products(s)

Warranty Guide

Description

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Overview

The Lenovo ThinkPad T420 4178-57U 90W AC Adapter Charger is engineered to provide dependable and efficient power for Lenovo ThinkPad business laptops. Delivering a regulated 20V DC output at 4.5A, it provides sufficient power to operate the laptop while simultaneously charging the battery.

Designed for professional environments, this charger supports office productivity, programming, accounting software, remote work, educational applications, presentations, online meetings, database management, and everyday business computing. Its intelligent voltage regulation protects sensitive laptop components while maintaining consistent charging performance.

Built with high-quality components, this adapter is an excellent replacement charger for business professionals, students, and everyday ThinkPad users.

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Price

Product	Price
Lenovo ThinkPad T420 4178-57U 90W AC Adapter Charger	KSh 3,360

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Full Specifications

Specification	Details
Product Name	Charger for Lenovo ThinkPad T420 4178-57U
Product Type	Laptop Charger
Brand	Lenovo Compatible
Compatible Model	Lenovo ThinkPad T420 4178-57U
Output Power	90W
Output Voltage	20V DC
Output Current	4.5A
Input Voltage	AC 100–240V
Input Frequency	50–60Hz
Connector Type	Lenovo Round Barrel (7.9 × 5.5 mm)
Adapter Type	External Switching Power Supply
Plug Type	UK 3-Pin
Housing Material	Fire-Resistant ABS
Colour	Black
Protection Features	Over-voltage Protection, Over-current Protection, Overload Protection, Over-temperature Protection, Short-circuit Protection
Condition	Replacement Compatible
Package Contents	90W AC Adapter Charger

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Electrical Output Specifications

Output Voltage: 20V DC regulated output.
Output Current: 4.5A continuous current delivery.
Maximum Output Power: 90 Watts.
Stable voltage regulation for dependable laptop performance.
High-efficiency AC-to-DC conversion.
Low ripple output for improved hardware protection.
Intelligent power regulation according to system demand.

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Common Wattage Tiers & Use Cases

45W Chargers

Suitable for lightweight notebooks and entry-level laptops used for basic computing.

65W Chargers

Recommended for ultrabooks, IdeaPads, Yoga laptops, and standard ThinkPads.

90W Chargers (This Charger)

Designed for ThinkPad business laptops such as the ThinkPad T420 4178-57U. Ideal for Microsoft Office, programming, accounting software, online meetings, remote work, educational use, presentations, database management, web browsing, and everyday professional computing.

135W Chargers

Recommended for ThinkPad mobile workstations and performance laptops with higher power requirements.

170W and Above

Designed for gaming laptops and high-performance mobile workstations.

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Input Specifications

Input Voltage: AC 100–240V
Input Frequency: 50–60Hz
Automatic voltage detection for worldwide compatibility.
High-efficiency switching circuitry.
Low operating temperature during prolonged charging.
Stable input regulation.
Designed for continuous daily use.

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Connector Types

Round Barrel Connector

7.9 × 5.5 mm Lenovo round barrel connector.
Secure and reliable fit.
Designed specifically for compatible ThinkPad laptops.

USB-C Power Delivery (PD)

Not supported.

Micro USB

Not applicable.

Proprietary Connectors

Not applicable.

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A FAQs

Q1. Is this charger compatible with the Lenovo ThinkPad T420 4178-57U?

Yes. It is designed specifically for the Lenovo ThinkPad T420 4178-57U and other compatible ThinkPad T420 models requiring a 90W 20V adapter.

Q2. What electrical output does this charger provide?

It delivers 20V DC at 4.5A, providing a maximum output of 90W.

Q3. Can I use the laptop while charging?

Yes. The adapter supplies enough power to operate the laptop while charging the battery.

Q4. Can this charger be used internationally?

Yes. It supports 100–240V AC, making it suitable for worldwide use.

Q5. Does this charger include built-in safety protection?

Yes. It includes protection against over-voltage, over-current, overload, overheating, and short circuits.

Q6. Is this a suitable replacement for the original Lenovo adapter?

Yes. It matches the required 90W (20V 4.5A) power specifications for the ThinkPad T420 series.

Charger for Lenovo ThinkPad T420 4178-57U – 90W 20V 4.5A Conclusion

The Lenovo ThinkPad T420 4178-57U 90W 20V 4.5A AC Adapter Charger delivers dependable, efficient, and safe charging for your ThinkPad laptop. Featuring a regulated 90W output, universal voltage compatibility, advanced safety protection, and durable construction, it is an excellent replacement charger for business professionals, students, and everyday users.