Exogear's Exovolt Plus: The stackable external battery pack arrives

There are a ton of external battery packs for iPhones and iPads. I remember the good old days when it seemed like the only packs available were little blobs that you'd plug into the bottom of an iPhone to keep it going for a few more hours. Now everybody and their brother-in-law has an external battery pack in their line, so it's nice to see one that's completely different from the rest of the pack. It's the Exogear Exovolt Plus, which has the distinction of being a stackable battery pack. Read on -- we're going to give away some goodies to one lucky TUAW reader.

Design and Functionality

The Exovolt Plus comes in two models: the main battery (US$89.95) and sub batteries (US$49.95 each). To power your iPod touch, iPhone, or iPad, you need at least one main battery. It has a micro-USB port for charging and a full-sized USB port to charge up your devices. There's also a power button and four white LEDs that give you the relative charge level of the stack of batteries.

The sub batteries are slightly thinner, don't have the ports, but do have a small socket on one top corner that contacts a male connector on the bottom of the main battery. The sub batteries also have one of those male connectors on the bottom, so you can stack as many of them as you want to to create a tower of power.


The Exovolt units are white, about 3-3/4" square, and have rounded corners. The bottom sides are blue, and there are small latches on the sub batteries to insure a solid connection to the main battery or other sub batteries.

To make sure that your stack 'o power is safe to be around, Exogear built in double circuit protection, overheat protection, short-circuit protection, and an automatic input/output control. The main battery package comes with a carry pouch, micro-USB and Dock Connector cables, and a simple user manual.

How much capacity do these things have? Each Exovolt Plus battery has a capacity of 5,200 mAh, and stacking ten of them would give you an astounding 52,000 mAh of energy for keeping your iPad going when the zombie apocalypse starts. Of course, that would put you back a whopping $539.50, but you'd have bragging rights...

In fact, nowhere on the Exogear website or in the limited documentation that comes with the Exovolt Plus did I see anything about a limit on how many of these things you can stack. Doing a little math and knowing that the main battery is 1.5 cm thick and the sub batteries are 1.2 cm thick (and assuming that the plastic would stand the weight of a huge column of batteries, which it wouldn't), you could equal the height of the Burj Khalifa (829.84 meters or 82984 cm) by stacking approximately 69,153 of these things at a cost of around $3,454,282. That thin tower would supply 359,595,600 mAh for your iPad movie watching marathon.

In all seriousness, though, the Exovolt batteries are well-built and a stack of these guys would get you through a lot.


The Exovolt Plus battery pack system is a unique, but pricey, way to make sure that you have power to spare for your electronic devices. The ability to stack the batteries for extra capacity is brilliant.


  • Nicely designed and built

  • Stackable design expands capacity as you need it


Who is it for?

  • Someone who needs a lot of power to go, and has the bucks to buy a lot of these stackable packs


We're giving away a pair of Exovolt Plus battery packs -- one main battery, one sub battery -- and a sweet Tabu tablet pouch to one lucky TUAW reader. Here are the rules for the giveaway:

  • Open to legal US residents of the 50 United States, the District of Columbia and Canada (excluding Quebec) who are 18 and older.

  • To enter, fill out the form below completely and click or tap the Submit button.

  • The entry must be made before August 21, 2012 11:59PM Eastern Daylight Time.

  • You may enter only once.

  • One winner will be selected and will receive one Exogear Exovolt Plus main battery valued at $89.95, one Exogear Exovolt Plus sub battery valued at $49.95, and a Tabu tablet pouch valued at $39.95.

  • Click here for complete Official Rules.