DIY Wireless Charger Mobile Power Bank Box with LCD Display, 4 * 21700 Battery Charger Case
#4
PULUZ

PULUZ DIY Wireless Charger Mobile Power Bank Box with LCD Display, 4 * 21700 Battery Charger Case

Rating

Model: B0CS3CSSSM
$23.99(incl. tax)Amazon price as of 2025-09-29
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Product Overview

The PULUZ DIY Wireless Charger Mobile Power Bank Box is a versatile kit that allows users to build their own power bank using 4 * 21700 batteries (not included). It features 2 USB output ports, Micro and Type-C input, and wireless charging capabilities. The LCD screen displays battery power, and LED indicators provide usage instructions. It supports temperature loop control, automatic load detection, and comprehensive protection against overvoltage, overcurrent, short circuits, and over-temperature. This DIY kit is suitable for various fast-charging protocols and offers a customizable power solution.

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Product Specifications

Battery Capacity
-mAh
Output Ports
2count
Input Ports
2count
Output Voltage
5 VoltsV
Output Current
5 AmpsA
Charging Time
-hours
Weight
119g
Size
140 x 90 x 30mm
Supported Protocols
-
Pass-Through Charging
-

Size & Weight

Weight
4.2 ounces
Hight
1.18 inches
Width
3.54 inches
Depth
5.51 inches

Features

Solar Charging Function

This power bank does not support solar charging. Solar charging is beneficial for outdoor activities where access to conventional power outlets is limited. This function is not available, so you will need a power source to charge the batteries.

Pass-Through Charging Function

This power bank does not explicitly mention pass-through charging. Pass-through charging allows you to charge both the power bank and your connected devices simultaneously from a single power source. This function is not confirmed.

Low-Current Charging Mode Function

This power bank does not explicitly mention a low-current charging mode. Low-current charging mode is designed for charging low-power devices, such as wireless earbuds and smartwatches, without overcharging or damaging their sensitive batteries. This function is not confirmed.

Digital Display Function

The LCD screen accurately displays the battery power, allowing you to check the battery power status at any time. This is a useful feature for monitoring the remaining charge and planning your charging needs accordingly. The LCD screen adds to the great features.

Built-in Cable Function

This power bank does not have built-in cables. Built-in cables reduce clutter and ensure compatibility with a variety of devices. You will need to carry your own charging cables. This might be slightly less convenient, but it does allow for greater flexibility in cable selection.

Wireless Charging Function

This power bank supports wireless charging, allowing you to charge compatible smartphones and other devices by simply placing them on the power bank's surface. It supports 22.5W+15W wireless charging. This offers a convenient, cable-free charging solution.

SHOPSTAFF Rating Score

#4
Ranked #4 out of 25 products in Category
3.4
Overall Rating

This DIY power bank kit offers a customizable and affordable solution for users who want to build their own portable charger. It has some limitations in charging speed and battery capacity compared to higher-end models. It is suitable for users who already have 21700 batteries.

Capacity and Battery Life
3.3
The battery capacity depends on the user-supplied 21700 batteries. This makes it difficult to determine the exact capacity and battery life, but it offers flexibility for users to choose their desired capacity. The lack of included batteries is a drawback.
Output Ports and Charging Speed
3.5
It features 2 USB output ports and supports fast charging, making it suitable for charging multiple devices. However, the exact charging protocols supported are not clearly specified, which may limit compatibility with some devices. It supports 22.5W+15W wireless charging.
Size and Portability
4.0
The compact size and lightweight design make it easy to carry around. It is suitable for everyday use and travel. The dimensions are 5.51 x 3.54 x 1.18 inches and the weight is 4.2 ounces without batteries.
Input Charging Speed
3.0
The input charging speed is not clearly specified, but it supports both Micro and Type-C input. The charging time will depend on the user-supplied batteries and the charging adapter used. It supports two-way fast charging.
Safety Features
4.0
It includes temperature loop control, automatic load detection, and comprehensive protection against overvoltage, overcurrent, short circuits, and over-temperature. These features ensure safe charging for both the power bank and connected devices. However, one review mentioned a lack of reverse polarity protection.
Durability and Build Quality
3.5
The build quality is described as solid, and the case is well-constructed. However, the long-term durability is uncertain due to the DIY nature of the product and the brand's limited reputation. Some reviews mention damaged units upon arrival.
Manufacturer Reliability and Warranty
2.0
PULUZ is a relatively unknown manufacturer in the power bank market, which raises concerns about reliability and warranty support. The customer service is described as reliable, but the overall brand reputation is limited. Staff ratings show 13% lowest quality ratings.
Cost Performance
4.0
At $23.99, this DIY power bank kit offers good value for users who want a customizable and affordable charging solution. However, the cost does not include the batteries, which need to be purchased separately. It is a cost-effective option for those with existing 21700 batteries.

Brand & Manufacturer Details

PULUZ
PULUZ is a leading manufacturer specializing in accessories for photographic and video equipment, providing high-quality products and services for photography enthusiasts.

Key Highlights

  • DIY customization
  • Affordable price
  • Wireless charging capability

Considerations

  • Pay attention to battery polarity
  • Use only compatible 21700 batteries
  • Avoid overcharging and extreme temperatures

Recommended For

  • DIY enthusiasts
  • Users with existing 21700 batteries
  • Users needing a basic portable charger

Not Recommended For

  • Users needing a ready-to-use power bank
  • Users requiring very high capacity
  • Those unfamiliar with electronics assembly

Suitable For

  • Customizing a power solution
  • Charging phones and small devices
  • Assembling a backup power source

Not Suitable For

  • High-demand charging scenarios
  • Situations requiring maximum reliability
  • When immediate power is needed without assembly

Frequently Asked Questions (FAQ)

Q.I'm looking for a power bank that I can customize. Is this a good option?
A.Yes, this PULUZ DIY Wireless Charger Mobile Power Bank Box allows you to create your own power bank by inserting 4 x 21700 flat-head batteries (not included). Staff confirmations highlight that it's easy to assemble and customize.
Q.Will this charge my phone quickly?
A.Yes, this power bank supports 22.5W wired and 15W wireless fast charging, with a charging current up to 5A. It is compatible with Apple, Huawei, Samsung, Xiaomi, OPPO, and Vivo phones. Staff confirmations mention fast charging capabilities.
Q.How can I check the battery level?
A.The battery box has an LCD screen that accurately displays the battery power, allowing you to check the charging status at any time.
Q.Is this power bank safe to use?
A.Yes, the battery box supports temperature loop control, automatic load detection, and multiple protection features including overvoltage, overcurrent, short circuit, and overcharge protection. However, one staff confirmation mentioned potential issues with reverse polarity, so it's important to ensure correct battery installation.
Q.Can I use different types of batteries with this?
A.This power bank is designed for 21700 flat-head batteries. One staff confirmation warns against using adapters to fit 18650 batteries, as it can be a fire hazard. Always use the correct type of battery.
Q.Is it easy to assemble?
A.Staff confirmations suggest that assembly is straightforward, even for those who aren't experts in electronics. The product is designed for easy and reliable construction of your own battery pack.
Q.What kind of ports does it have?
A.This power bank is equipped with 2 USB output ports, Micro and Type-C input ports, and supports wireless charging.
Q.How durable is this power bank?
A.Staff confirmations indicate solid build quality. The case feels well-constructed, making it suitable for both hobbyists and those needing a reliable portable power solution.

SHOPSTAFF Rating Ranking

#1

GUSGU

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$59.99(incl. tax)Amazon price as of 2025-09-29

20,000mAh power bank with foldable plug, built-in Type-C cable, and USB-C/USB-A ports for fast charging.

Battery Capacity20000 mAhOutput Ports2 count
Input Ports1 countOutput Voltage20 V
Output Current3.25 ACharging Time hours
Weight5.6 gSize mm
Supported ProtocolsPDPass-Through Charging
Solar Charging FunctionPass-Through Charging FunctionLow-Current Charging Mode FunctionDigital Display FunctionBuilt-in Cable FunctionWireless Charging Function
4.0Overall Rating
4.5Capacity and Battery Life
4.3Output Ports and Charging Speed
4.0Size and Portability
4.0Input Charging Speed
4.2Safety Features
3.8Durability and Build Quality
3.0Manufacturer Reliability and Warranty
4.0Cost Performance
#2

BoxWave

Power Bank Compatible with Netgear Nighthawk MR1100 Mobile Hotspot

$149.95(incl. tax)Amazon price as of 2025-09-29

Portable power bank compatible with Netgear Nighthawk MR1100. High capacity with 65W Power Delivery.

Battery Capacity30000 mAhOutput Ports2 count
Input Ports- countOutput Voltage- V
Output Current- ACharging Time- hours
Weight- gSize- mm
Supported ProtocolsPDPass-Through Charging-
Solar Charging FunctionPass-Through Charging FunctionLow-Current Charging Mode FunctionDigital Display FunctionBuilt-in Cable FunctionWireless Charging Function
3.9Overall Rating
5.0Capacity and Battery Life
4.5Output Ports and Charging Speed
3.5Size and Portability
4.0Input Charging Speed
4.0Safety Features
4.0Durability and Build Quality
3.0Manufacturer Reliability and Warranty
3.5Cost Performance
#3

Cuddeback

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$119.87(incl. tax)Amazon price as of 2025-09-29

Solar power bank for CuddeLink & Tracks cameras, featuring a built-in NiMH battery and Genius Mount Kit.

Battery Capacity1800 mAhOutput Ports- count
Input Ports- countOutput Voltage7.2 V
Output Current- ACharging Time- hours
Weight- gSize6.25” x 5.75” x 1.6” mm
Supported Protocols-Pass-Through Charging-
Solar Charging FunctionPass-Through Charging FunctionLow-Current Charging Mode FunctionDigital Display FunctionBuilt-in Cable FunctionWireless Charging Function
3.4Overall Rating
2.5Capacity and Battery Life
2.0Output Ports and Charging Speed
3.5Size and Portability
3.0Input Charging Speed
4.0Safety Features
4.5Durability and Build Quality
4.5Manufacturer Reliability and Warranty
3.5Cost Performance
#4

DIY power bank case with wireless charging and LCD. Requires 4 * 21700 batteries. Compact, functional, and affordable.

Battery Capacity- mAhOutput Ports2 count
Input Ports2 countOutput Voltage5 Volts V
Output Current5 Amps ACharging Time- hours
Weight119 gSize140 x 90 x 30 mm
Supported Protocols-Pass-Through Charging-
Solar Charging FunctionPass-Through Charging FunctionLow-Current Charging Mode FunctionDigital Display FunctionBuilt-in Cable FunctionWireless Charging Function
3.4Overall Rating
3.3Capacity and Battery Life
3.5Output Ports and Charging Speed
4.0Size and Portability
3.0Input Charging Speed
4.0Safety Features
3.5Durability and Build Quality
2.0Manufacturer Reliability and Warranty
4.0Cost Performance
#5

BoxWave

Solar Wireless Rejuva PD Power Pack (16000mAh)

$39.95(incl. tax)Amazon price as of 2025-09-29

16000mAh solar power bank with wireless charging, PD, USB-A, and LED flashlight. Rugged design for outdoor use.

Battery Capacity16000 mAhOutput Ports2 count
Input Ports1 countOutput Voltage5V/9V/12 V
Output Current3 ACharging Time - hours
Weight467 gSize - mm
Supported ProtocolsPDPass-Through Charging -
Solar Charging FunctionPass-Through Charging FunctionLow-Current Charging Mode FunctionDigital Display FunctionBuilt-in Cable FunctionWireless Charging Function
3.4Overall Rating
4.0Capacity and Battery Life
3.5Output Ports and Charging Speed
3.0Size and Portability
3.0Input Charging Speed
3.5Safety Features
4.0Durability and Build Quality
2.0Manufacturer Reliability and Warranty
4.0Cost Performance