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Cygnett Boost 20000mAh Powerbank - Black
CY4751PBCHE
$79
± Click the icons above as terms, conditions & fees apply
INSTANT DEAL
Get $40 off when you spend $300-$399.99 or $60 off when you spend over $400 on a Huge Range~~
Use promocode AUGDEAL in cart.
~~Ends 11.59pm AEST 16/08/2026. Excludes Dyson, Coffee Machines, Samsung Galaxy Fold8, Fold8 Ultra, Flip8 and Galaxy Watch9 and Watch Ultra2, Acer Laptops, Asus Laptops, Chromebooks, HP Laptops, Lenovo Laptops, Samsung Tablets, Monitors & Canon Printers, products marked special order, sold out, unavailable, coming soon and shipped by “supplier”, all Pre-orders, Apple, Boost, Belong, Telstra Plans, digital vouchers, gaming credits and streaming services, Gift Cards, Services, Gold Service Extras, Installation & Delivery. For online purchases, excludes products marked as in store only. You must spend over the eligible amounts on eligible products excluding delivery in a single transaction to use the Code. Code must be applied in cart to receive the discount for online purchases. Code can be used in store, over the phone, via online chat. Can be used on The Good Guys website in conjunction with Price Beat when available on individual product pages. Code cannot be used on any commercial orders. For instore and over the phone purchases, discount will be applied at point of sale. Cannot be used in conjunction with any other discount offer. Offer applies to the current ticketed price of relevant products. As prices change regularly and we frequently run sales and negotiate on price, some products are likely to have been sold below the current price prior to this offer. Prices may change after offer ends.
Product Overview
Key Features
- Powerbank for charging phones and tablets
- 20000mAh capacity with 15 Watt total power
- 1 USB-C and 2 USB-A connection ports
- Includes 15cm USB-A to USB-C cable
INSTANT DEAL
Get $40 off when you spend $300-$399.99 or $60 off when you spend over $400 on a Huge Range~~
Use promocode AUGDEAL in cart.
~~Ends 11.59pm AEST 16/08/2026. Excludes Dyson, Coffee Machines, Samsung Galaxy Fold8, Fold8 Ultra, Flip8 and Galaxy Watch9 and Watch Ultra2, Acer Laptops, Asus Laptops, Chromebooks, HP Laptops, Lenovo Laptops, Samsung Tablets, Monitors & Canon Printers, products marked special order, sold out, unavailable, coming soon and shipped by “supplier”, all Pre-orders, Apple, Boost, Belong, Telstra Plans, digital vouchers, gaming credits and streaming services, Gift Cards, Services, Gold Service Extras, Installation & Delivery. For online purchases, excludes products marked as in store only. You must spend over the eligible amounts on eligible products excluding delivery in a single transaction to use the Code. Code must be applied in cart to receive the discount for online purchases. Code can be used in store, over the phone, via online chat. Can be used on The Good Guys website in conjunction with Price Beat when available on individual product pages. Code cannot be used on any commercial orders. For instore and over the phone purchases, discount will be applied at point of sale. Cannot be used in conjunction with any other discount offer. Offer applies to the current ticketed price of relevant products. As prices change regularly and we frequently run sales and negotiate on price, some products are likely to have been sold below the current price prior to this offer. Prices may change after offer ends.
Key Specifications
- Brand:
- Cygnett
- Model Number:
- CY4751PBCHE
- Compatible Phones:
- iPhone, Android, Tablet
- Wired Connections:
- 1x USB-C, 2x USB-A
- Battery:
- 15W
- Type:
- Powerbank
General Information
- What's In The Box:
- 15cm USB-A to USB-C Cable
Warranty
- Manufacturer's Warranty:
- 2 Year
General Information
- What's In The Box:
- 15cm USB-A to USB-C Cable
Product Dimensions
- Product Height (mm):
- 145
- Product Width (mm):
- 71
- Product Depth (mm):
- 29
- Product Weight (g):
- 490
Box Dimensions
- Box Height (mm):
- 160
- Box Width (mm):
- 32
- Box Depth (mm):
- 120
- Box Weight (kg):
- 0
Product Reviews of Cygnett Boost 20000mAh Powerbank - Black
Overall Rating Snapshot
4.7 out of 5 stars from 82 reviews
96% of users recommend this product
What customers say, summarised by AI
- Large battery capacity, reliably charges multiple devices several times.
- Compact and portable with a sturdy metal casing; slightly heavy for travel.
- Convenient digital display shows remaining battery charge percentage.
- Efficient and fast charging for phones and tablets, perfect on long trips.
- Can charge up to three devices simultaneously; helpful for emergencies.
- Takes time to fully recharge; only one USB-C port may be limiting.
Pros
Easy (4)
Value (3)
Reliable (3)
Portable (1)
Cons
Speed (3)
Works as expected
Happy with this product .. works well
Kylie Ward
Confirmed purchase 17 July 2026
Published on 14 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Great. Backup system for traveling
This is a perfect way to ensure that we have a backup system for our phones whilst traveling off grid in our caravan. Small, compact, portable and powerful
Karen T
Confirmed purchase 11 July 2026
Published on 13 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Sufficient to charge 3 devices
It is handy and comes with string in the box. Charge more then 3 devices with full 🔋. Digital display to show how much power is left
Jignesh Patel
Confirmed purchase 21 July 2026
Published on 12 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Powerbank
This is a nice product . I like it when i am travelling .
Geetan
Confirmed purchase 17 July 2026
Published on 11 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Cygnett Boost 20000mAh Powerbank - Black
Everything seems to work well with this powerbank. I have charged my phone a few times already without needing to charge this powerbank which is a win!
Tanya M
Confirmed purchase 10 July 2026
Published on 7 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Great Product
Good digital display and long lasting charging rate
Steve
Confirmed purchase 12 July 2026
Published on 5 August 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Great little powerbank.
Purchased this to take on long trip. Quick charging 2 mobiles & a tablet. Quick to recharge unit as well. Excellent product
Cathy
Confirmed purchase 20 June 2026
Published on 17 July 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Great Value item, can't go wrong
This works perfectly. Surprised at the value for such a great item.
Robert
Confirmed purchase 11 June 2026
Published on 7 July 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Small but Powerful
Great portable charger. Compact but plenty of charge.
Joel
Confirmed purchase 4 May 2026
Published on 26 May 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
Thumbs Up!
Multi-device charging, big capacity, 78% charged before purchase (I topped it up to 100% before first use) .
KathM
Confirmed purchase 23 April 2026
Published on 20 May 2026
Yes, I recommend this product.
This customer is a verified purchaser who may have received an incentive in return for providing an authentic review.
You've viewed 10 of 82 reviews
ABOUT THE GOOD GUYS REVIEWS
The Good Guys product reviews are collected from verified purchasers who may have received an incentive in return for providing an authentic review.
The below information is AI generated based on Australian websites information around this item. We have done our best to ensure its accuracy but suggest verifying any information within this tab before purchasing.
At a glance
The Cygnett Boost 20000mAh Powerbank is a versatile, high-capacity portable charger ideal for users who need reliable power on the move. With three USB ports (1x USB-C, 2x USB-A), it can charge up to three devices at once and is suitable for phones and earbuds. Its compact size and included lanyard make it easy to carry. While it offers up to 15W charging, it lacks ultra-fast charging speeds found in some premium models.
What it’s great for
- Everyday Charging
- Travel
- Multi-Device Charging
- Emergency Backup
Where it works best
- Commuting
- Travel
- Office
- Home
- Outdoor Activities
Who it’s for
- Frequent Travellers
- Students
- Busy Professionals
- Tech Enthusiasts
Things to consider
Does not support ultra-fast charging above 15W, so may not be ideal for users needing rapid top-ups for high-end devices.
Fast charging suitability
6/10 - Supports up to 15W charging, suitable for standard fast charging but not high-speed protocols.
Multi-device compatibility
Wide compatibility with phones, earbuds, and other USB-powered devices.
Travel suitability
8/10 - Compact size, lanyard, and high capacity make it excellent for travel.
Durability vs category average
7/10 - Solid build quality, but not ruggedised for extreme conditions.
Ease of use score
9/10 - Simple operation, clear battery indicator, and ready-to-use out of the box.
Key benefits
- High Capacity: 20,000mAh battery provides up to 5.2 full phone charges, reducing the need for frequent recharging.
- Triple Device Charging: Simultaneously charge up to three devices with 1 USB-C and 2 USB-A ports.
- Universal Compatibility: Suitable for any phone and most earbuds, ensuring broad device support.
- Compact Design: Measures just 14.5 x 7.1 x 2.9 cm, making it easy to carry in bags or pockets.
- Pre-Charged Out of the Box: Ready to use immediately, saving time for users.
- Battery Indicator: Built-in battery percentage display helps monitor remaining power at a glance.
- Lanyard Included: Added portability for travel and daily use.
Q: Can the Cygnett Boost 20000mAh power bank charge a laptop or tablet?
A: No. This model has a maximum output of 15W, which suits phones, earbuds and some smaller USB-powered devices, but it is generally below the 45W or higher that most USB-C laptops need. Tablets may charge, but not at laptop-class speeds.
Q: How many phone charges can this 20000mAh Cygnett power bank deliver in real use?
A: It can deliver up to 5.2 full phone charges when used with a typical smartphone battery, as stated by Cygnett. In real use, the result varies with your phone size, cable quality and charging losses, so larger phones will usually get fewer full recharges.
Q: Can all three ports on this Cygnett Boost power bank be used at the same time?
A: Yes. It has three output ports, 1 x USB-C and 2 x USB-A, so it can charge up to three devices at once. Keep in mind the maximum output is 15W, so charging may be slower when several devices are connected together.
Q: Is a 20000mAh power bank too large for everyday carry?
A: It depends on how much backup power is needed. At 145mm x 71mm x 29mm, this is more of a bag or commute power bank than a slim pocket model, but the larger capacity suits travel, long workdays and charging more than one device.
Q: Is this Cygnett Boost 20K better for travel than a smaller power bank?
A: It is better for longer days away from a charger because the 20000mAh capacity gives more total backup power than compact 5000mAh or 10000mAh models. The trade-off is extra size and weight, so it suits bags and travel more than light pocket carry.