A 21700 Transparent Black Power Bank is a portable charging device that typically uses 21700 lithium-ion cells to store energy. The "21700" refers to the battery cell's size (21mm diameter and 70mm length), which is larger than the more commonly used 18650 cells, allowing it to store more power. Here’s a more detailed description:
Features:
Transparent Black Case:
The outer casing is made from a transparent black material, allowing you to see the internal components like the battery cells, wiring, and circuit board. It gives the device a modern, industrial look while maintaining a sleek design.
21700 Battery Cells:
The power bank is powered by 21700 lithium-ion battery cells, known for their high capacity and efficiency. These cells are typically used in high-power devices like electric vehicles, giving the power bank a higher energy density than standard models.
Capacity:
Depending on the number of 21700 cells used, the power bank can offer a substantial capacity, typically ranging from 10,000mAh to 30,000mAh or more, allowing multiple charges for your smartphone, tablet, or other USB-powered devices.
Fast Charging Capabilities:
Many modern power banks with 21700 cells support quick charging technologies like Qualcomm Quick Charge or USB Power Delivery (PD). This allows fast charging of both the power bank itself and connected devices, with outputs ranging from 5V/2.1A to 9V/2A or higher.
Multiple Ports:
A transparent black power bank often features multiple output ports, such as USB-A, USB-C, and micro-USB, providing compatibility with a wide range of devices.
USB-C ports may support two-way charging, meaning you can use the same port to charge the power bank and your device.
LED Indicator:
Many models include LED lights that indicate the power level and charging status, either on the side or embedded within the transparent casing for a modern look.
Durability & Safety:
Equipped with built-in protection circuits to prevent overcharging, short circuits, and overheating.
Despite the transparent design, the casing is typically made from durable plastic or acrylic, protecting the internal components from drops or bumps.
Design Appeal:
The transparent black casing is often chosen for its aesthetic appeal, giving users a glimpse of the technological workings inside, while still maintaining a sleek, almost futuristic appearance. This type of power bank may appeal to tech enthusiasts or those who want a more visually interesting design.
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