Charging the HP Chromebook 11 Without the Factory Micro-USB Charger.

Hint: Its all about the cables!

The HP Chromebook 11
The HP Chromebook 11

The HP Chromebook 11 broke new ground by using a fast 3 Amp Micro-USB charger. It also generated a lot of bad publicity early on when the US chargers had to be recalled due to overheating. The USB charging is effective because the computer has a relatively small battery, and thus achieves a fairly rapid charge. To get reasonable battery life despite a very bright 300 nit screen, it uses a relatively low powered processor, limiting it’s performance. At a weight less than a Mac Book Air, it is a joy to carry, and on short business trips, the ability for the single, light charger to charge every device I carry is seductive.

But there are reports that the chargers are difficult to replace if they fail. Any Micro USB charger can charge the Chromebook overnight, but they lack the power to charge the machine while it is running. A 1 Amp phone charger will raise an alert that it is a low powered charger, and the running device will still bleed down slowly.

My experience with a variety of chargers and cables shows that while many chargers will deliver the required 3 Amps, the Cable used is the big leveler. The original HP charger is rated at 3 amps and works fast. I have not dismantled it, but I am sure it uses heavy gauge wire.

Most USB cables use thin #28 or #24 AWG wire. Non-intuitively, lower numbers are thicker and therefore better conductors of current. The USB charger supplies 5 V (volts) and the thicker the wires the better. Thin wires provide resistance, and power coming from the charger is lost as heat in the cable. So as a rule of thumb, shorter is better, and thicker is better. Over the last 12 months I have tested about 30 different cables. Some were quite expensive, many were not. The shortest ones worked best, but at 200 mm (8 inch) cable is not very convenient.

PortaPow fast charging cable
PortaPow fast charging cable

The single best charging cable I have found comes from PortaPow in England. It is the PortaPow Fast Charge Micro USB Cable (Length: 100cm (3.3ft)) Most cables of this length would only deliver 0.6 – 0.7 A. That translates to about 3.5 W, not enough to charge and run a Chromebook. The PortaPow cable delivers 1.75 A or about 8.75 W. from the same power supply. I believe my cable is #22 AWG, but they have since increased the size of the conductors to #20 AWG and I have two more on order.

Lets look at three chargers that work well with this cable. In each case the Chromebook is running with multiple tabs open, multiple docs, Gmail, Drive and some web pages. WiFi is on, and I am using a Bluetooth mouse. Brightness is at about 80%. In all cases they are reported as low power chargers.

Anker 4 Port Charger
Anker 4 Port Charger

My favourite charger is the Anker 40 watt, 5 port IQ+ charger. It has been superseded by a 60 watt version, but mine is working fine and does not need an upgrade. With the PortaPow cable, it delivers 1.75 A and the Chromebook is working and charging steadily. If I close the lid and hibernate for 30 minutes, it will charge up by 12%. Basic arithmetic suggests about 4 hours to go from 20% to 100%. With the computer working, of course, it will be MUCH longer, but will get there.

Kensington 2 amp Charger
Kensington 2 amp Charger

I also have a Kensington 2 amp, 4 port charger that can be plugged into the power socket or be used with a figure 8 cable instead of the adapter. It charges the Chromebook at 1.45 A and has enough power in reserve to also charge my smartphone without reducing power to the Chromebook.

Finally, the ASUS 2 A wall-mount charger that came with my Nexus 7. This small charger is rated at 2 A and pushed about 1.35 A through the PortaPow cable. This is enough to run the Chromebook with a little left in reserve for charging. With my current settings it is charging at about 3% per hour. I would suggest playing video at full brightness will cause the battery to drop.

There is an endless parade of USB Chargers, and the cheaper ones are not worth the time. Ask yourself if you really want a $5 charger between mains voltage and your expensive device, and then move on to a name brand charger.

My summary of the best options:

If you already have a 2 amp charger lying around ( I am sure you do) simply buy the PortaPow fast charging cable, and you are in business. The Nexus 7 charger weighs 62 grams (2.2 oz) with an Australian plug.

If you want flexibility and low weight, the Kensington 2 amp charger (112 grams ( 4 oz)) comes with a range of international plugs, and can be used with a figure 8 cable if the power outlet is inaccessible and can charge four devices (up to 2 amps) simultaneously.

For speed and power, there is no substitute for the Anker 5 port IQ+ charger. It weighs in at a hefty 250 grams (8.8 oz) with a cable but I have been on vacation with four people, a chromebook, three tablets, four smartphones, a USB powered WiFi hotspot and assorted keyboards mice and Bluetooth headsets and the Anker handled the lot perfectly.

My Review of the Anker Charger is here, you might enjoy it.

I also reviewed the HP Chromebook 11, and decided It is my favorite Chromebook despite it’s limitations!

Arlec 3.1 Amp 2 port Fast USB Charger + GPO

Arlec DA30 USB Charger
Arlec DA30 USB Charger

A good USB Charger is essential for the Small/Mobile Office user.  Australian users will be impressed by the Arlec DA30 High Powered USB Charger. These are advertised on the  These are advertised on the Bunnings web site.

The DA30 has has 2 USB ports, charging at 3.1Amps plus a GPO (Power outlet). That makes it a pass-through power outlet. This allows two USB devices to be charged, while still providing a power point for another device. This is a Get Out Of Jail Free card for someone in a place where they can only access a single power point.

The label says USB 1 is 1 amp and USB 2 is 2.1 amps. Unfortunately, the outlets are not labeled, so I used a current meter, and found the left hand port is the 2.1A and the right hand port is 1A.

My research has shown that USB charging ports are not all equal. This device is advertised as being for an iPad and iPhone. I do not own Apple devices, only Android. I am testing charging rates on other devices to see how well it performs there, and it seems to perform quite well.

It has matched the best charging rate for each cable and device across all the chargers I have tested. In reality, most devices will not allow charging at much above 1.5A, so the DA30 is a good, quick charger.

I TRUST Arlec, an Australian company based in Sydney. The products may be manufactured overseas, but an Aussie brand used heavily in building and in industry will maintain it’s quality and protect it’s brand. Arlec, and Australian manufacturer, will maintain standards that many importers will not. I am using two of these chargers, and  recommend that Australian based nomads, both Gray and Digital, support Arlec and buy this product.

I have purchased two, and will soon buy two more. One thing I cannot get enough of is USB charging ports.

This device is a fixed 240 volt Australian pin layout. International travellers need chargers that work form 110 to 240 volts and fit multiple power sockets. This WILL NOT work safely overseas, but here in Australia, this looks good.

My only complaint is the Blue LED is a little bright in a dark bedroom.

For use inside Australia, I recommend this charger for daily use. Beside the bed, in the office or in the suitcase, car or caravan while travelling, this is a great device.

For international travellers or those flying with severe weight restrictions, you should look further.

Anker IQ 40W 5-port Smart USB Charger Reviewed

Anker 40W charger
Anker 40W charger

The best USB power supply I have seen is the Anker 5 port, 8 amp smart charger. It uses a so-called PowerIQ charging system to provide the best power possible for each device. It is a small brick shaped device that connects to the wall via a figure-eight cable.

A USB based charger can charge most portable devices, from Android phones and tablets, iPhones, iPads, Bluetooth headsets, Cameras, to a wealth of other devices.

Most of these devices come with a “wall wart” plug pack and a USB to micro or mini USB plug, or the Apple Lightning connector. Carrying the original charger for every device we own, and finding a power outlet for each is impossible.

The Anker charger is a small brick, smaller than a cigarette packet, (58 x 91 x 25mm) with 5 USB ports on one end and the small two-pin figure eight socket on the back. The advantage of this (and the wide power supply range) is that the charger can be used in any country with the addition of the correct cable. It can be found on Amazon here and eBay here.

Every USB device makes it’s power requirements known by talking to the charging port via serial communications through the two inside pins, or, for dumb charging devices, by being wired with certain resistors in the power lines. This allows a smart charger to supply just the right amount of power to each device. The Anker charger is very well regulated, and assuming the cables are of suitable quality, maximum charging speeds will result. Overcharging is impossible as long as decent cables are used. I label the cables that come with my devices and try to keep the correct cable with each device. I have only once seen a different cable to cause a problem. It was supposed to have a “Fast Charge” switch on the plug. switching to “Fast Charge” caused charging to stop completely! More about cables another time.

Anker 5 Port 40W charger
Anker 5 Port 40W charger

I found the results to be impressive, though I could never get my HP Chromebook 11 to charge at anything like the 3 amps that it’s dedicated charger is supposed to deliver. But I torture tested the Anker charger on a one week stay in Melbourne recently. I was sharing accommodation with three other device users. Each night four smartphones, three tablets, a USB charged HP Chromebook 11, a power bank, Bluetooth headsets, two keyboards and a USB powered Seagate WiFi hotspot and media server all had to be kept topped up by the Anker IQ 40W 5-port smart USB charger. It worked flawlessly for the week, charging everything, in some cases with split two headed charging cables connected.

Anker 5 Port 40W charger Replacement
Anker 5 Port 40W charger Replacement

The Anker IQ 40W 5-port charger comes with an 18 month warranty, and this is backed by an impressively fast and helpful customer support operation. My first charger had one port die within a week. Anker asked for the serial number of the device, and had a replacement in the mail within 24 hours. Since they are in the US and I am in Australia the replacement arrived with great speed. A tribute to a real belief in quality and customer support.

Anker now has a 60W version, but I seriously doubt it will result in faster charging except with the most extreme combination of devices. But if you believe more is better, here is a link to the 60W charger on Amazon.