Charger for Acer  Aspire 5742 20V 4.5A 90W 

• Type:  Power AC Adapter
• Input Voltage: AC 100-240V~50/60HZ
• Output Voltage: DC 19V 3.42A/4.74A 
• Max. Output Power:   　65W/90W
• Connector Size:  5.5*1.7mm (as pictures)
• Manufacture Guaranty: 12 Months
• Operate Environment: Please keep the environment cool and dry!

Charger for Acer  Aspire 5742 20V 4.5A 90W 

The Acer Aspire 5742 20V 4.5A 90W Laptop Charger is a reliable and cost-effective replacement adapter designed to meet the exact power specifications of the Acer Aspire 5742 laptop. Built to deliver 20 volts at 4.5 amps and a maximum of 90 watts of continuous power, this charger ensures stable energy supply for everyday computing, professional tasks, study, and entertainment. The Acer Aspire 5742 20V 4.5A 90W Laptop Charger Price in Kenya is KSh 2,500, making it an affordable and practical choice for users seeking a dependable power solution.

Who Should Buy This Charger?
This charger is ideal for Acer Aspire 5742 owners who need a compatible replacement or spare power adapter that matches the original laptop power requirements, helps protect battery health, and supports consistent performance under typical usage scenarios.

Price Table – Acer Aspire 5742 20V 4.5A 90W Laptop Charger Price in Kenya

Key Specifications Table – Acer Aspire 5742 20V 4.5A 90W Laptop Charger

Design and Build Quality – Acer Aspire 5742 20V 4.5A 90W Laptop Charger

The Acer Aspire 5742 20V 4.5A 90W Laptop Charger combines a compact design with durable build quality. The charger’s outer casing is made from reinforced ABS plastic that resists cracking, heat deformation, and everyday wear. The finish is smooth but sturdy, which helps protect internal components from impact and friction.

The charger brick itself is lightweight and portable, making it easy to carry in bags or laptop cases without adding significant weight. Its dimensions are suitable for both travel and desk setup, while ventilation grooves help dissipate heat during extended use.

The round barrel connector is engineered with precision to ensure a snug and secure fit into the power jack of the Acer Aspire 5742 laptop. This reduces the likelihood of loose connections or accidental disconnections. Both ends of the cable include reinforced strain relief to prevent internal wire breakage — a common point of failure in lower-quality chargers.

The cord length (approximately 1.2–1.5 meters) offers flexibility for various setups, whether you are working at a desk, on a couch, or away from a wall outlet. The overall build quality reflects thoughtful engineering aimed at minimizing wear and maximizing long-term reliability.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Charging Speed and Efficiency

The Acer Aspire 5742 20V 4.5A 90W Laptop Charger delivers power efficiently and consistently:

• Delivers the full 90 W output to match the laptop’s design specifications.

• Ensures even voltage and current output for stable performance.

• Reduces energy loss with high conversion efficiency circuitry.

• Maintains steady charging speed while the laptop operates under typical loads.

• Supports simultaneous charging and normal laptop use without interruption.

• Helps preserve battery life through consistent power delivery patterns.

By maintaining regulated output and minimizing fluctuations, this charger ensures that the laptop’s battery operates within safe parameters, which can extend the battery’s overall lifespan.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Safety Protection Technologies

Safety is a key component of the Acer Aspire 5742 20V 4.5A 90W Laptop Charger design. It integrates multiple protection systems that safeguard both the charger and the connected laptop:

• Overvoltage protection: Prevents excessive voltage from reaching the laptop’s internal circuits.

• Overcurrent protection: Stops current from exceeding safe limits that could damage internal components.

• Short-circuit protection: Detects and mitigates sudden surges that can lead to electrical faults.

• Thermal protection: Monitors and controls heat generation to reduce the risk of overheating.

• Insulated build: Helps protect users and devices from electrical shocks.

These protective features work together to reduce risks associated with power surges, fluctuations, and other electrical anomalies commonly experienced in unstable power environments.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Connectivity and Compatibility

This charger is specifically designed to be compatible with the Acer Aspire 5742 series. Its connectivity features include:

• A precisely engineered round barrel connector suited for Acer laptop power ports.

• Compatibility with charging requirements of 20 V and 4.5 A.

• Integration with the laptop’s built-in power management system to ensure safe charge cycles.

• Reliable connection that stays secure under normal usage conditions.

Though primarily intended for the Acer Aspire 5742 model, this charger may also work with other Acer models that share the same voltage, current, and connector specifications.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Cable Strength and Durability

High-quality cable strength is essential for a long-lasting charger. The Acer Aspire 5742 20V 4.5A 90W Laptop Charger cable is engineered to withstand daily handling:

• Thick and flexible cable: Resists kinks and bends that typically damage internal wires.

• Reinforced connector ends: Enhances cable reliability where stress is most common.

• Abrasion-resistant insulation: Minimizes damage from friction and surface wear.

• Adequate length: Supports various work setups without stress on the plug or socket.

These features contribute to reduced wear and tear, ensuring that the charger remains functional even with frequent use.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Energy Management and Heat Control

Efficient energy management and heat control are essential for charger safety and performance:

• Energy-efficient design: Reduces power wastage and improves operational stability.

• Balanced heat distribution: Prevents hotspots within the charger unit.

• External heat dissipation: Charger casing helps radiate heat away from internal circuits.

• Stable performance: Maintains consistent output even during extended charging sessions.

Such design measures enhance overall reliability and reduce the risk of thermal stress on both the charger and the laptop.

Ideal Use Cases – Acer Aspire 5742 20V 4.5A 90W Laptop Charger

The Acer Aspire 5742 20V 4.5A 90W Laptop Charger is suitable for a range of real-world uses:

1. Home Computing: Powering web browsing, media playback, and document editing.

2. Office Productivity: Supporting tasks like spreadsheets, email, and presentations.

3. Travel and Remote Work: Lightweight and compact for charging on the go.

4. Backup Charger: Useful as a spare charger for emergencies or secondary locations.

5. Student Use: Reliable power for research, assignments, and online classes.

6. Multitasking Environments: Handles daily use while running multiple programs.

7. Professional Work: Supports stable power delivery during professional workloads.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Smart Features

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Intelligent Power Delivery

• Automatically stabilizes power output.

• Minimizes unnecessary energy draw.

• Helps protect battery health through controlled voltage delivery.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Overvoltage and Short Circuit Protection

• Shields the laptop’s internal circuitry from anomalies.

• Reduces electrical risk in unstable power conditions.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Universal Compatibility Features

• Engineered for Acer Aspire 5742 power requirements.

• Maintains stable performance across compatible devices.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Fast-Charging Support

• Delivers efficient charging performance at rated 90 W.

• Keeps temperatures within safe ranges during moderate usage.

Acer Aspire 5742 20V 4.5A 90W Laptop Charger Energy Efficiency and Performance Modes

• Supports optimized energy use.

• Maintains steady output under varied load conditions.

Pros and Cons Table – Acer Aspire 5742 20V 4.5A 90W Laptop Charger

Frequently Asked Questions – Acer Aspire 5742 20V 4.5A 90W Laptop Charger Price in Kenya

What is the Acer Aspire 5742 20V 4.5A 90W Laptop Charger price in Kenya?
The price is KSh 2,500 in Kenya.

Is this charger compatible with other Acer models?
Yes — it can work with other Acer models that require 20 V 4.5 A and a round barrel connector.

Does this charger support safety protections?
Yes — it includes overvoltage, overcurrent, short-circuit, and thermal protections.

Can this charger deliver power while using the laptop?
Yes — it supports typical laptop use while charging.

How long is the cable?
The cable is approximately 1.2–1.5 meters long.

Is this an OEM charger?
It is a high-quality compatible replacement, not necessarily branded as OEM.

Will it damage my laptop battery?
When used properly, it provides regulated power designed to support safe battery operation.

Does it support fast charging standards?
This charger delivers efficient power at its rated 90 W but does not use modern USB-C fast-charging protocols.

Conclusion – Acer Aspire 5742 20V 4.5A 90W Laptop Charger Price in Kenya

The Acer Aspire 5742 20V 4.5A 90W Laptop Charger offers dependable, efficient, and safe power delivery for the Acer Aspire 5742 laptop. With essential safety protections, stable output, and durable construction — all at a competitive price in Kenya of KSh 2,500 — this charger delivers excellent value for everyday users, students, and professionals alike. Its design emphasizes reliability and long-term performance, making it a smart choice for anyone seeking a trusted replacement or spare charger for regular laptop use.