Tag Archives: USB charger

OPPO Reveals 125W Wired + 65W Wireless Charging Tech!

OPPO 125W Wired + 65W Wireless Charging Tech Details!

OPPO just unveiled 125W wired flash charging and 65W wireless charging – the fastest in the world!

Get briefed on the new OPPO flash charging technologies, and find out if they really matter!


OPPO Reveals 125W Wired + 65W Wireless Charging Technologies!

Let’s start with the official tech briefing on the two new fast charging technologies.

OPPO 125W Flash Charge (Wired)

The new OPPO 125W wired flash charging technology is built around a Double 6C cell battery, with multiple tab winding technology – allowing for a much higher input current of 12.5 A.

The new battery charging technology also uses three parallel charge pumps, which converts the charger input of 20V @ 6.25A into 10V @ 12.5A, with a 98% conversion efficiency.

To ensure the battery charges safely, OPPO added 10 new temperature sensors, to make sure the phone temperature do not exceed 40°C.

At 125W full power, it will recharge a 4,000 mAh battery to 41% in 5 minutes, and to full capacity in just 20 minutes.

However, this is a prototype technology, which will not soon make it into any phone.

OPPO 65W AirVOOC (Wireless)

OPPO claims that the 65W AirVOOC will deliver the same charging performance as 65W SuperVOOC, thanks to parallel dual charging coils with an 88% charging efficiency.

This allows it to fully recharge a 4,000 mAh battery in just 30 minutes! Crazy fast for wireless charging!

To ensure that the phone temperature does not exceed 40°C, the AirVOOC wireless charger uses two thermoelectric coolers (Peltier heat pumps) to whisk the heat away from the charging phone.

However, anyone who has ever used a Peltier can tell you that it gets very hot on the other side!

While OPPO claims an 88% transmission and receiving efficiency, the power required for thermoelectric cooling will greatly reduce AirVOOC’s power efficiency.


Two OPPO GaN Fast Chargers

OPPO also announced two fast chargers that use GaN technology to greatly reduce their sizes.

This is the OPPO 50W mini SuperVOOC charger, which is about the size of a business card, and weighs just 60 grams.

And this is the OPPO 110W mini flash charger, which offers 110W of pulse charging in a charge the size of a regular 18W fast charger.


OPPO 125W Flash Charge | 65W AirVOOC : Vapourware?

First, we have to point out that these are, as far as we know, still prototypes that may or may not make it to the market.

After all, OPPO announced their 120W Super FlashCharge last year, and nothing come of it. No phone launched with 120W flash charging capability, not even from OPPO.

So will OPPO introduce 125W flash charging or 65W AirVOOC? Unlikely anytime soon.

Find out WHY in our opinion piece : OPPO 125W Flash Charge | 65W AirVOOC : Vapourware?


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GELID ZenTree USB Charging Station Review

Smartphones and tablets are now so ubiquitous that most families own multiple devices. Charging them becomes a real problem. More so if you also own smartwatches or smartbands. You either use multiple chargers, or recharge them in turns. This is where USB charging stations come in. They allow multiple devices to be recharged at once.

Most are just glorified USB hubs that are used to supply power. But once in a while, you come across a really unique USB charging station that is not only functional and aesthetic pleasing, but also designed to quick charge your devices. We present the GELID ZenTree USB charging station!


GELID ZenTree Specifications

SpecificationsGELID ZenTree
Number of USB ports4
Maximum Output Current2.4 A per port
Maximum Power Output12 W per port
48 W total
Power Conversion Efficiency> 87%
Idle Power Consumption0.04 W
Dimensions224 mm wide x 159 mm deep x 95 mm high
Weight590 grams
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Unboxing The GELID ZenTree

The GELID ZenTree USB charging station comes in an attractive white retail box with a handle for easy transport. Be sure to check the bottom of the box for the plug type. GELID offers a choice of four different plug heads. This video takes you through our unboxing process.

Once you remove everything from the box, you should find the following items :
  • One GELID ZenTree USB charging station
  • One GELID ZenTree installation instruction sheet
  • Two cable holders (with double-sided tape applied)
  • Four micro USB cables (40 cm long)
  • One power cord (four plug type options)

Now, let’s take a closer look at the GELID ZenTree and check out how well it works!

Next Page > The GELID ZenTree, Fast & Smart Charging, 3D Tree Array


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The GELID ZenTree USB Charging Station

The GELID ZenTree USB charging station is made up of a base unit that contains the USB charging ports, and a unique 3D tree array lid with with a removable silicone rubber cover. The lid is secured by two locks that allow for quick access to the USB ports inside.

The four micro USB cables (provided in the package) allow you to charge up to four devices simultaneously. If you have Apple devices though, you will need to use your own Lightning cables, as the GELID ZenTree does not come with any Lightning cable. This video shows you how to install and use the GELID ZenTree USB charging station.

Now, the GELID ZenTree is not just a fancy powered USB hub. Let’s take a closer look at the GELID ZenTree’s key features.


Fast & Smart Charging

The four USB ports in the GELID ZenTree are not ordinary USB 2.0 ports. They can deliver up to 2.4 A of current simultaneously. Standard USB 2.0 ports can only deliver up to 1.5 A of current. This means the ZenTree can potentially recharge your mobile devices 60% faster than if you used an ordinary USB 2.0 port.

Of course, that high output is only part of the story. The ZenTree has a smart chip that automatically negotiates the best charging current for the device. This ensures the most efficient charging speed, while helping to extend the lifespan of the device’s battery. The GELID ZenTree is about 87% efficient in converting power from an AC source into the DC power for the USB ports.

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3D Tree Array

The 3D tree array is not only aesthetically-pleasing, it accommodates devices of all sizes in any position. You can also loop the cables around the “trees”.

The 3D tree array is covered with a layer of green silicone rubber. This soft anti-slip layer not only protects your smartphones and tablets from being scratched, it also prevents your devices from slipping off. This silicone rubber layer even peels off for easy cleaning.

Next Page > Space Saving, Our Verdict, Award


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Space Saving

The first thing we realised after using it was how much desktop space it saved us. Take a look at these before and after photos we took of our mobile lab.

In the first picture, you can see five devices – the Samsung Galaxy S6, the ASUS ZenFone 2 Laser, the ASUS ZenFone Zoom, the honor 5X and the ASUS ZenPad 7.0. That is how we used to arrange them, and they take turns sharing two USB cables running off two separate chargers.

Once we mounted those devices on the GELID ZenTree, they took up far less space. In fact, when we stacked the ZenTree on top of our KVM switch, that really freed up a lot of desktop space!

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Our Verdict

The GELID ZenTree USB charging station is really useful for those who have many mobile devices. It gives us four high-current USB charging ports in a very unique design. You will either love the bright green colour and organic design, or you won’t. But you will definitely appreciate the convenience of being able to charge four devices simultaneously.

It is also important to point out that the ZenTree uses a Smart IC to automatically control the charging current. This is important because it ensures fast and safe charging, as well as better battery lifespan. It really pays to invest in quality USB chargers.

We like the click-lock design which allows for quick access to the USB ports, as well as the removable silicone rubber cover. It speaks of attention to detail, something which is lacking in many other products. In fact, we like the GELID ZenTree so much, we think it deserves our Reviewer’s Choice Award. Congratulations, GELID!


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Huntkey SZN507 Smart Power Strip Review

Huntkey was established two decades ago as a manufacturer specialising in power supply products. Today, they have over 750,000 square meters of manufacturing space in Shenzhen, Heyuan and Hefei industrial parks in China.

They started as an OEM supplier to brands like Dell and Lenovo, but have recently started selling their own Huntkey-branded products.  Let’s take a look at one of their universal series power strips – the Huntkey SZN507 smart power strip.

The Huntkey SZN507 is part of the Huntkey universal series of power strips. They are called the universal series because the power sockets support major plug types in the United States, Europe and Asia.


The Huntkey SZN507 Power Strip

The Huntkey SZN507 comes in a clear plastic package with a cardboard back, so you can immediately see what you are buying. The power cord is hidden behind a cardboard printout showing the key features of the SZN507 power strip.

The cardboard back slides right off to reveal the power strip with the power cord inside a cardboard compartment. You will find nothing but the SNZ507 power strip inside.

The Huntkey SZN507 superficially looks like many power strips. It even comes with the same wall mount holes at the back. However, the SZN507 is no ordinary power strip. Let’s take a closer look!


Universal Power Sockets

The Huntkey SZN507 comes with four power sockets. These are universal power sockets that support 7 major plug types in America, Europe and Asia. Specifically, these power sockets will support the Type A, Type B, Type C, Type E, Type F, Type G and Type I plugs. However, it does not support the Type J, Type H, Type K and Type L plugs.

These power sockets are also feature “child protection”, in the form of collapsible plastic shutters over the two live pins of the socket. They prevent children from inserting the points of the scissors or a knife into the socket. The shutters will only collapse when an actual plug is inserted, and presses on them simultaneously. Smart!


USB Charging Ports

The Huntkey SZN507 comes with two USB charging ports. The two USB ports will deliver up to 10.5 W of power output – 2.1 A of current at the standard USB voltage of 5 V. Each port, however, can only deliver about 5 W of power – about 1 A of current at 5 V.

These USB ports allow you to recharge your smartphones, tablets and power banks without requiring a separate USB power adaptor. It may not recharge as quickly as newer power banks and fast chargers which can deliver higher currents, but its key advantage is its convenience..

Next Page > Page 2 : Safety Features, Our Verdict

Double-Break Switch & Copper Bar

The Huntkey SZN507 comes with a double-break switch, which has breaks the electrical contact at two points, instead of a single contact. This not only offers twice the breaking capacity, it also provides a greater contact surface when the circuit is closed – allowing for better heat dissipation and a longer switch life.

Huntkey also plated the switch contacts with a silver-nickel alloy to reduce contact resistance, and protect them against corrosion and oxidation. Hence, the double-break switch is rated to last over 10,000 times.

To ensure maximum safety and lifespan, Huntkey used a solid copper bar internally to conduct electricity to the power sockets. As copper is a better conductor of both electricity and heat than aluminium or steel, the use of a copper bar would result in both a lower heat output as well as better dissipation of the heat.


Power Cord

The Huntkey SZN507 comes with a 3 meter (10 feet) long power cord. The length is important for many users, but many people ignore the quality of the cable – specifically the ability of the wires inside to conduct that much electricity. If the power cord does not use the proper wires, they will overheat and potentially start a fire.

The SZN507 use three insulated wires with a minimum conductor cross section of 0.75 mm². The power cord is therefore capable of handling a maximum current load of 12 A, or a maximum power output of 2,880 watts. In other words, the Huntkey SZN507 is more than capable of handling the rated power output of 2,500 watts.


Power Plug

Huntkey offers four different plug options for the SZN507, depending on which region it’s sold. Irrespective of the plug type the SZN507 comes with, the power plug is only fused for a maximum current of 10 A. And we checked – it actually uses a 10 A fuse. This is important because it guarantees that the SZN507 power strip is never overloaded.

Most power strips use the more common 13 A fuse. In most cases, you won’t face any issues, but there is a risk of overloading the power strip. Using a 13 A fuse would allow the power strip to receive up to 13 A of current, which would overload the (12 A) conduction capacity of the power cord, causing it to overheat and potentially melt and/or catch fire.


Our Verdict

[adrotate banner=”4″]The Huntkey SZN507 is a power strip designed for the discerning modern family. Superficially, it looks just like any other power strip, but inside – it conceals a ton of safety features. Everything, from its internal copper bar structure to its 10 A fused plug, is designed to ensure that the SZN507 will never exceed its specifications and overheat or worse, catch fire.

We are not talking just about its listed safety features or its certification by various safety authorities. It is also about their attention to detail. Everything we inspected checked out, meeting or exceeding their own specifications. That is not something we can be sure of if we purchase an ordinary power strip from Walmart or Tesco.

The Huntkey SZN507 isn’t a power strip designed just for the techie who wants to ensure that his/her devices will never get destroyed by a power surge. Anyone who wants a properly-designed and built power strip for peace of mind should consider the Huntkey SZN507.


Huntkey SZN507 Specifications

SpecificationsHuntkey SZN507
Maximum Power Output2500 W (250 V @ 10 A)
Power Sockets4 x power sockets (250 V @ 10 A)
2 x USB sockets (5 V @ 2.1 A)
Safety FeaturesDouble-break silver-nickel contact switch with service life of over 10,000X
One-piece copper bar structure
Child protection for power sockets
CertificationsBS, CSA, VDE, STQC
Power Cord Quality3 x 0.75 mm² wires (Germany / India)
3 x 1.0 / 0.75 mm² wires (UK)
3 x 0.824 mm² wires (US)
Plug OptionsGermany + France dual use / India / UK / US


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