Finally took the plunge to buy a Hyperjuice 2 PowerBank for my MacBooks (either my company issued Macbook Pro Retina 15 or my own Macbook Air 13). Due to the nature of my job, I don’t usually go back to office as most of the time I’m at clients’ sites. During the time where I’m not, I will work on the designs and documentation that I need to complete. I think a lot of people will choose a cafe and enjoy a cuppa while doing this.
This is no different for me. But those living in Singapore will know that this may have quite a bit of restrictions if you want to look for power plugs, or worst still, for those who are driving, finding an affordable carpark with power plugs and good cup of coffee where you can stay for hours can be a pretty challenging task. In addition to this, internet access is also desirable and usually either you will have a mobile broadband dongle, mobile broadband modems/routers or simply tethering from your mobile phone. For me I used to come from mobile broadband dongles, to modems/routers and finally to tethering. Seriously to bring more things along means there are additional weight or things that you may eventually lose due to whatever reasons. So using tethering from mobile seems to be the way for me. So battery becomes an issue and I bring along a Powerbank.
To achieve my “total mobility” to have mobile power for both my mobile and Macbook for the whole day out in the field, I hope with Hyperjuice2, this will help me to do that. Now to the depths of my review for this battery! 🙂
Hyperjuice2 Official Specifications
|Battery Chemistry||Lithium Ion|
|MacBook Battery Life||Up to 26 hours|
|iPad mini Battery Life||Up to 71 hours|
|iPad (1G & 2G) Battery Life||Up to 50 hours|
|iPad (3G & 4G) Battery Life||Up to 34 hours|
|iPhone Battery Life||Fully recharge the iPhone up to 19 times|
|Dimensions||8.0 x 4.8 x 0.9 inches (204 x 123 x 24 mm)|
|Weight||1.6 pounds (0.73 kg)|
|DC Output Power||14.5~18.5V (4.5A max)|
|USB Output Power||2 x 12W, 5V (2.4A max)|
|AC Power Supply Input Power Output Power||100V~240V (1.2A max) 18.5V, 2.5A|
|Time to full charge||3-4 hours|
Hyperjuice Official Power Chart
Before I start with the review, a few pictures on how the Hyperjuice 2 looks like. First, I was given a customised cable with a magsafe connector (not the magic box) and it actually works. the hyperjuice is pretty nice looking in person. Official ratings at the back of the unit.
Pictures on the LCD information panel
The test procedure that I undertook is simple.
- Discharge Macbook Pro Retina 15 to 0%
- Fully charge Hyperjuice 2 to 100%
- Let both units cool down for 1/2 hour
- Charge Macbook Pro Retina 15 with lid closed till Hyperjuice 2 goes lights out and can’t be power-on
A few pictures to show:
There is a caveat why I need to get a Hyperjuice2 instead of a 1.5. In fact if you ask me, I would prefer a bigger capacity more than 100wh (27,000mAh). Reason is simple. The more juice you have in the battery, the longer you can last.
However there is a technical constraint on the amount of power required for Macbook Pro Retina due to the higher wattage and amperage. In fact the new Macbook Pro Retina 15 requires 20V with 4.25A of output power before you can start to charge based on the power adapter. After looking for quite a while I couldn’t really find other brands of power banks that could give me the same as this with nice looking casing except for Hyperjuice.
If you do not mind too much about looks at size + low USB power charging port (~1A), you can give BixPower a look. They have a few powerbanks that are pretty good and they have power connectors for Mac as well. This is one of the units that I was looking at but I’m not satisfied by the USB charging capabilities as I’m using Samsung Galaxy Note 2 which requires a 2A USB port.
Anyway below shows the testing charts and the actual mileage you could potentially get from your unit if you purchase one. In my example, I’m using a Macbook Pro Retina 15 (Late 2013) unit which has 95Wh battery within. By the charts above, it should provide a 1-1 power which obviously does not. (See below for more)
Power Efficiency – Charging / Discharging on Workload
|Cycle||Hours to full
|Device for charging||% of Device
|% of Device
|1||~ 4 hours||Macbook Pro Retina 15||6||86||Power-off||Discharge @ 30deg Celsius|
|2||~ 4 hours||Macbook Pro Retina 15||0||76||Power-off||Discharge @ 40deg Celsius|
|3||~ 4 hours||Macbook Pro Retina 15||0||79||Power-off||Discharge @ 45deg Celsius|
|4||~ 4 hours||Macbook Pro Retina 15||0||78||Power-off||Discharge @ 42deg Celsius|
After logging a ticket to Hyper, the support gave the response that typical batteries or power banks will experience a loss of 20% so even given that the specifications state the same number of hours the battery can provide to my macbook or any other devices, in actual fact you would want to take off 20% from that equation. Thus beware of this caveat before you purchase this. My personal thoughts is that they should reflect the actual efficiency and estimation rather than the paper specifications.
Other Features and Notes
This power bank does support a few other features that’s not exactly mentioned and I also found out some other options for parts replacement if required to.
- The HyperJuice 2 can be used together in parallel with your device when plugged into the wall socket. So this is good news for those who do not like to bring along your Macbook charger when you have your power bank with you.
- The Hyper Juice 2 however, during the plugged in state, will still continue to discharge power to your device and it seems to be at a slower rate. So this would probably mean that the battery is not capable of handling both charges at the same time. For road warriors, you may want to take this into consideration whether bringing your power adapter for the power bank is worthwhile or not.
- HyperJuice 2 is modular, means that the parts can be replaced when it fails. I’ve checked with Hyper support, the cost price for the replacement battery is USD$149 at this point.
I hope this review will help some of us make a decision point whether to buy it or not. For me it’s still good for me though I’m expecting 90% of efficiency but technically it’s not possible. I was hoping they have a unit with a higher capacity for the modular model but unfortunately, it’s not available as of now.