Biography
We know nothing of Gan De's life and very little about his work. The dates we give are guesses, although we do know that at least they are roughly correct (we do know for instance that he was making observations in 365 BC). He was one of the earliest of Chinese astronomers and made observations which he recorded giving dates and coordinates. We know of two books which he wrote, namely the Suixing Jing(Treatise on Jupiter) and the Tianwen Xingzhan(Astrological Predictions), but sadly both texts have been lost.We have included Gan De this archive for one reason only. That is that a quotation from his book Suixing Jing(Treatise on Jupiter) was recorded by later writers. This records an observation which he made in the summer of 365 BC:-
Jupiter was very large and bright. Apparently, there was a small reddish star appended to its side. This is called 'an alliance'.Of course the intriguing question is what was the small reddish star which Gan De saw? Could it have been one of Jupiter's satellites? This has intrigued those interested in the history of astronomy. If he did see one of the Galilean satellites, then it would have been Ganymede which is the brightest of the four. Ganymede can have a magnitude of 4.6 which means that it is within the range which anyone might expect to see. However the reason that Ganymede is not readily visible is that Jupiter, being so much brighter and so close to Ganymede when viewed from earth, obscures the faint satellite. Gan De might have possessed exceptional eyesight and been able to separate the faint Ganymede and the bright Jupiter. The only thing in the description which would have one doubt this is the fact that Gan De records the small star on the side of Jupiter to be reddish. At this low light level colours are not distinguished by the eye. However, we must remember that he observed under conditions of absolutely no light pollution, something impossible today.
Evidence on the positive side suggesting that he did indeed observe Ganymede comes from the accuracy of his observations in general. He gave the following description of Jupiter's journey through the constellations:-
Every 12 years Jupiter returns to the same position in the sky; every 370 days it disappears in the fire of the Sun in the evening to the west, 30 days later it reappears in the morning to the east ..and also gave accurately observed details of the planet's movements throughout its 12 year cycle. We also know that Gan De produced star catalogues.
If you keep yourself abreast of the tech world's current happenings, you must know that Gallium Nitrate technology is one of the hottest charging innovations to hit the market. GaN chargers, as they are more commonly known, have two big advantages. Firstly, they are significantly smaller than their silicon counterparts. Secondly, for their size, they are capable of delivering a huge amount of power. And when you combine these benefits with the advantages of USB-C Power Delivery, you get the perfect recipe for fast charging. Well, almost.
Though GaN chargers bring you the advantage of fast charging, they are not as cheap as their silicon counterparts, since it's a new technology. Thankfully, they are not exorbitantly priced either and the best part is that you will get the worth of your price.
Available on PC and Mac. How would you like to play Pixel Gun 3D? PixelGun3D for PC is the best PC games download website for fast and easy downloads on your favorite games. PixelGun3D is available for free on PC, along with other PC games like Clash Royale, Subway Surfers, Gardenscapes, and Clash of Clans. Games.lol also provide cheats, tips. GaN Technology makes a charger smaller and smaller, small to just half size of your normal charger, 1/4 size of your laptops charger, save half space for your outlet. No matter you are preparing for your office use or travel use, X21 always makes your outlet slim and clean.(imagine how messy when plug in with some clumsy chargers). Spotify is a digital music service that gives you access to millions of songs. My husband Joel has had the priviledge to have worked for the Gan family for almost 25 years. First for Mac's brother, Harry. Then for Mac and Ken at Mac's II where he still enjoys employment. I myself, have had the priviledge over those 25 years to have met Mac and Evelyn's acquaintance at several holiday get togethers, company picnics etc.
Here are a few of the best ones if you are searching for the best GaN chargers with Power Delivery. Let's have a look. But before that,
- Here are the best USB‑C Power Delivery cables that you should buy
- Which USB 3.2 Gen 2 Type‑C cables should you buy and why
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1. RAVPower PD Pioneer 90W GaN Tech Wall Charger
- Total Power: 90W
- PD Output: 18W/30W/45W/60W/87W/90W
RAVPower PD Pioneer 90W GaN Tech Wall Charger
The RAVPower PD Pioneer GaN wall charger is the one for you to look for massive wattage. This small charger that measures roughly 2.5 x 2.5 x 1.2-inches can deliver around 90 wattages of power. Woah, right? You can use this charger for topping your MacBook Pro's battery as well as your phones. It supports USB Power Delivery 3.0.
Another advantage of USB PD wall adapters is that they charge the connected phone as per its rating. For example, if you have an 18W rated Pixel phone to it, you will get the requisite power. And when it comes to your Mac, you can expect the battery to charge fully in around 2 hours.
The key feature of this wall adapter is that it packs two USB-C ports, thereby giving you the advantage of charging both your phones and laptop at the same time. The power segregation is clever and clear. When both the ports are connected to the laptop, the charger delivers 45W each to the laptops. Or, if you hook it to a laptop and a smartphone, you will get 60W and 30W each. At the same time, you can leave aside worries of power surcharge.
The build is solid, and the pins retract back inside the adapter when not in use, thus increasing its portability quotient. And yeah, the charger ships with a PD compatible cable.
2. Aukey Omnia
- Total Power: 65W
- PD Output: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A
Aukey Omnia
If you do not want to pay more than $50 for a wall adapter, you should check out the Aukey Omnia. This is a 65W wall adapter that is priced less than $40 and packs a USB-C port and a USB-A port. When a single device is connected to the USB-C PD port, you can expect a power output of 65W. However, it dwindles to 45W when both the ports are used.
While the 65W may not be enough to power the new MacBook Pro (see best HDMI adapters for the MacBook Pro), it's good enough to sustain it for a short time. The good news is that it is apt with a compatible USB-PD phone or a USB-C tablet.
Again, for the wattage it delivers, it's small and compact. The company claims that it's 50% smaller than the 61W USB-C charger from Apple. If we talk numbers, the Omnia weighs just 3.6 ounces and measures roughly 2.05 x 2.05 x 1.18-inches. And guess what, it also comes with folding pins. However, you will have to buy a full-featured USB-C cable.
Also on Guiding Tech Top 5 Wireless Mouse With USB-C Connector Read More3. Anker PowerPort Atom PD 2
- Total Power: 60W
- PD Output: 5V/3A, 9V/3A, 15V/3A, 20V/3A
Anker PowerPort Atom PD 2
When it comes to chargers and power banks, Anker has been a long-standing name primarily because of their product quality, and the new PowerPort Atom PD 2 should not be any different. Like its RAVPower counterpart, it also bundles two USB-C ports, making it easy to charge two USB-C devices simultaneously. It's slim, sleek, and compatible with several USB-C devices.
USB-PD ensures that the connected devices will be topped up fast and quick. For instance, the company claims that the iPhone X's battery can reach 50% in just 30 minutes.
The power segregation is equal between the ports. For example, when a single device is connected, it delivers 60W of power, and when two devices are connected, 30W of power is divided between the two ports.
Do note that it's not compatible with Samsung's Adaptive fast charging technique, and you won't get the 25W fast charging.
It's worth noting that the PowerPort Atom PD 2 is not as small and compact as the chargers mentioned above.
4. Blitzforce Wall Charger
- Total Power: 65W
- PD Output: 18W to 65W
Blitzforce Wall Charger
If you do not wish to distribute power between two devices, Blitzforce Wall Charger is the best option for you. This is a single port charger and has a power output of 65W. The primary highlight of this charger is its size. This one measures a mere 1.9 x 1.9 x 1.2-inches and will easily fit into your palm. So yeah, you can lay aside worries of it hogging space on your power strip. Parallel desktop for mac os x free download.
Again, it's worth mentioning that USB-PD means that compatible devices can pull the power based on their rating. So be it an 18W-rated phone or the 30W-rated MacBook Air, this wall adapter will only provide the required power.
The RAVPower PD Pioneer GaN wall charger is the one for you to look for massive wattage. This small charger that measures roughly 2.5 x 2.5 x 1.2-inches can deliver around 90 wattages of power. Woah, right? You can use this charger for topping your MacBook Pro's battery as well as your phones. It supports USB Power Delivery 3.0.
Another advantage of USB PD wall adapters is that they charge the connected phone as per its rating. For example, if you have an 18W rated Pixel phone to it, you will get the requisite power. And when it comes to your Mac, you can expect the battery to charge fully in around 2 hours.
The key feature of this wall adapter is that it packs two USB-C ports, thereby giving you the advantage of charging both your phones and laptop at the same time. The power segregation is clever and clear. When both the ports are connected to the laptop, the charger delivers 45W each to the laptops. Or, if you hook it to a laptop and a smartphone, you will get 60W and 30W each. At the same time, you can leave aside worries of power surcharge.
The build is solid, and the pins retract back inside the adapter when not in use, thus increasing its portability quotient. And yeah, the charger ships with a PD compatible cable.
2. Aukey Omnia
- Total Power: 65W
- PD Output: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A
Aukey Omnia
If you do not want to pay more than $50 for a wall adapter, you should check out the Aukey Omnia. This is a 65W wall adapter that is priced less than $40 and packs a USB-C port and a USB-A port. When a single device is connected to the USB-C PD port, you can expect a power output of 65W. However, it dwindles to 45W when both the ports are used.
While the 65W may not be enough to power the new MacBook Pro (see best HDMI adapters for the MacBook Pro), it's good enough to sustain it for a short time. The good news is that it is apt with a compatible USB-PD phone or a USB-C tablet.
Again, for the wattage it delivers, it's small and compact. The company claims that it's 50% smaller than the 61W USB-C charger from Apple. If we talk numbers, the Omnia weighs just 3.6 ounces and measures roughly 2.05 x 2.05 x 1.18-inches. And guess what, it also comes with folding pins. However, you will have to buy a full-featured USB-C cable.
Also on Guiding Tech Top 5 Wireless Mouse With USB-C Connector Read More3. Anker PowerPort Atom PD 2
- Total Power: 60W
- PD Output: 5V/3A, 9V/3A, 15V/3A, 20V/3A
Anker PowerPort Atom PD 2
When it comes to chargers and power banks, Anker has been a long-standing name primarily because of their product quality, and the new PowerPort Atom PD 2 should not be any different. Like its RAVPower counterpart, it also bundles two USB-C ports, making it easy to charge two USB-C devices simultaneously. It's slim, sleek, and compatible with several USB-C devices.
USB-PD ensures that the connected devices will be topped up fast and quick. For instance, the company claims that the iPhone X's battery can reach 50% in just 30 minutes.
The power segregation is equal between the ports. For example, when a single device is connected, it delivers 60W of power, and when two devices are connected, 30W of power is divided between the two ports.
Do note that it's not compatible with Samsung's Adaptive fast charging technique, and you won't get the 25W fast charging.
It's worth noting that the PowerPort Atom PD 2 is not as small and compact as the chargers mentioned above.
4. Blitzforce Wall Charger
- Total Power: 65W
- PD Output: 18W to 65W
Blitzforce Wall Charger
If you do not wish to distribute power between two devices, Blitzforce Wall Charger is the best option for you. This is a single port charger and has a power output of 65W. The primary highlight of this charger is its size. This one measures a mere 1.9 x 1.9 x 1.2-inches and will easily fit into your palm. So yeah, you can lay aside worries of it hogging space on your power strip. Parallel desktop for mac os x free download.
Again, it's worth mentioning that USB-PD means that compatible devices can pull the power based on their rating. So be it an 18W-rated phone or the 30W-rated MacBook Air, this wall adapter will only provide the required power.
Gan Machine Video
This charger doesn't ship with a charging cable and you must buy one on your own if you do not already have one.
Alternatively, you can check out the Blitzforce 2-port charger. This one is a 65W GaN charger and supports PD 3.0.
Also on Guiding Tech 5 Best USB-C Docking Stations With Power Delivery Read MoreCharge It Right
With USB-C Power Delivery, you must carry a full-featured cable when charging compatible devices. At the same time, check the compatibility of your phone with the charger. Most wall adapters have a list of incompatible devices in their pages.
If you happen to own a Samsung phone with a 25W adaptive fast charge adapter, the odds are that most of these chargers won't be compatible with it. Of course, you will get the 15W fast charging. However, you will miss out on the 25W 'Ultra' fast charging.
Next up:Is your messy desk making you feel unproductive? Take the control back with these cool and nifty cable management accessories.
The above article may contain affiliate links which help support Guiding Tech. However, it does not affect our editorial integrity. The content remains unbiased and authentic.Read Next8 Best Desk Cable Management Accessories You Can BuyAlso See#Buying Guides #Amazon US
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