Charmast 20000mAh Power Bank with 4 Built-in Cables, 22.5W Fast Charging Portable Charger for iPhone, Android, iPad, No Extra
Reviewed 23 August 2026 · price checked live
Check price on Amazon →Overview
charmast 20000mAh Power Bank with 4 Built-in Cables is one of the 36 portable sound & video products in our catalogue, tracked on rating, review volume and live price. The maker describes it as follows: Stop carrying loose cables! This power bank has 4 fixed cables (USB-C, for iPhone, Micro-USB, USB A) and 4 extra ports (USB-C, Micro USB, 2x USB-A) to charge up to 6 devices at once. Get back to 50% battery in about 30 minutes for most modern phones. The built-in USB-C and for iPhone cables support 20W PD/QC fast charging. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.4 out of 5 from 4,683 ratings. What that score is worth next to its rivals is set out below.
- Brand
- charmast
- Amazon rating
- 4.4 / 5 from 4,683 ratings
- vs Portable Sound & Video
- level with the category median of 4.4
- Rank in category
- 22 of 36 rated portable sound & video we track
- Price position
- Towards the top of the range (category spans £5.99 to £74.99)
- How proven
- Moderate review volume
How it compares in Portable Sound & Video
Across the 36 rated portable sound & video products we track, the typical score is 4.4 out of 5. This one sits at 4.4, which is around the middle of the category. Ratings alone will not separate it from its rivals here, so price and the specifics below matter more than the star count.
It carries 4,683 ratings against a category median of 4,821. That is enough of a base to take the score seriously without treating it as settled.
On price it sits in the upper third of a category running from £5.99 to £74.99, where the midpoint is about £13.99. Paying above the category norm needs a reason beyond the rating, because the score alone does not justify the gap here.
Worked out from the 36 portable sound & video products in our catalogue, not from the brand's own claims. How we rank →
Key features
- 【All-in-One Power Bank: 4 Built-in Cables + 4 Ports】Stop carrying loose cables! This power bank has 4 fixed cables (USB-C, for iPhone, Micro-USB, USB A) and 4 extra ports (USB-C, Micro USB , 2x USB-A) to charge up to 6 devices at once. It’s the ultimate cable-free solution for families, travel buddies, or anyone with multiple gadgets. The built-in USB-A cable even recharges the power bank itself—just plug it into a wall adapter.
- 【22.5W Super-Fast Charging: Power Up in Minutes】 Get back to 50% battery in about 30 minutes for most modern phones. The built-in USB-C and for iPhone cables support 20W PD/QC fast charging, while the USB-A port delivers up to 22.5W for compatible Android devices. Perfect for quick top-ups between meetings, during layovers, or in any time-sensitive situation.
- 【20000mAh Travel-Ready Power: Lasts for Days】With enough capacity to fully charge an iPhone 15 up to 4 times, this power bank is your all-day power companion. It’s friendly for air travel and reliable for camping, long commutes, or power outages. Never ration your battery life again.
- 【Smart Digital Display: Always Know Your Exact Battery Life】Plan your day with confidence. The precise LED screen shows remaining power down to 1%, so you’ll never be caught off guard by a dead power bank. It’s smarter and more accurate than traditional 4-dot indicators.
- 【Designed for Real Life: Slim, Durable & Ultra-Convenient】We designed it for the real world: The sleek, pocket-friendly profile fits easily in bags; the built-in cables are sturdy and tangle-free; and the included travel pouch adds extra protection. Everything you need is in one box—power bank, manual, and pouch—ready to simplify your charging chaos.
