[QRD Junior E5] Battery & Charging Guide – qrdgame

[QRD Junior E5] Battery & Charging Guide

The QRD Junior E5 Mini Controller is powered by a built-in 450mAh rechargeable lithium battery, designed specifically for lightweight controllers and low-power gaming applications. To guarantee safety, reliability, and the longest possible battery life, it is important to use the correct charging method.

This guide explains how to charge the controller safely, what to avoid, and why some users may experience power or battery issues when incorrect chargers are used.

 

1. Important Battery Specifications

The QRD Junior E5 uses:

  • Built-in lithium battery: 450mAh

  • Rated charging input: 5V / 500mAh

This means the controller is engineered to be charged only by low-power USB sources.
It does not support fast charging, high-current charging, or direct charging from wall adapters.

 

2. Do NOT Use Power Adapters or Phone Chargers

⚠️ Very Important: do not use any external charger plug or phone power adapter to charge the controller.

Many customers have reported issues such as:

  • Controller cannot be powered ON after charging

  • Battery protection circuit was triggered

  • Internal battery damage caused by fast-charging adapters

Modern phone chargers often use:

  • 9V / 12V power modes

  • Quick-Charge (QC)

  • Smart fast-charge negotiation

These are not suitable for a 5V/500mAh controller battery, and may cause:

  • Over-current protection activation

  • Battery overheating

  • Permanent damage

To ensure safety, never connect the controller to a wall charger, phone charger, PD charger, or fast-charging power adapter.

 

3. Correct Charging Method

The only recommended safe charging method is:

✔ Use a USB-C cable and connect to any USB 5V port, such as:

  • PC / Laptop USB port

  • PlayStation 5

  • PlayStation 4

  • Nintendo Switch Dock

  • TV / monitor USB port

These ports deliver stable 5V low-current power, ideal for small lithium batteries.

 

4. Charging Time

  • Full charging normally requires about 3 hours

  • LED indicators will show charging status depending on model configuration

Charging time may vary slightly depending on:

  • Remaining battery level

  • USB port output current

  • LED vibration usage

 

5. Why Some Controllers Could Not Power ON

If a fast-charging adapter was used before, the controller may enter battery protection mode.

Symptoms may include:

  • Controller does not turn ON

  • No response from buttons

  • Battery seems “dead” even after charging

In most cases, the internal battery protection circuit has shut down to prevent damage.
A stable 5V USB source may restore it after some time, but severe cases may require service support.

 

6. Best Practices for Battery Health

To maintain battery life:

  • Always charge with USB 5V / 500mA

  • Avoid long periods of 0% battery

  • Disconnect from USB after fully charged

  • Do not charge in hot environments

  • Do not expose to liquids or high humidity

Following these tips can significantly extend battery lifetime.

 

7. Summary

The QRD Junior E5 battery is designed for low-power USB charging only.
Using external chargers, phone adapters, or fast chargers is not supported and may cause damage.

To charge safely:

Use USB-C cable → connect to PC / PS5 / PS4 / Switch
Charging takes around 3 hours and ensures safe battery operation.