You can never have enough battery power, especially when you're traveling. A handy flashlight and a fancy LCD for management don't hurt either. If you're in the market for an external battery pack, Woot has an especially big one on sale today: a massive 16800mAh portable charger from Gorilla Gadgets. You can pick it up for $39.99 plus Woot's usual $5 shipping, which is $30 off the same product on Amazon.


Let's say your smartphone has a battery capacity of 2400mAh. With this gadget, you can recharge it a full seven times without ever needing to find a wall charger. Bigger and more capacious phones (Galaxy Note, MAXX, any of the large-screen phablets) will get fewer charges, but they also tend to last longer anyway. Depending on the size of your tablet, you could get 2-4 complete recharges out of the portable battery pack. Throw in a handy LCD to show the remaining charge, dual 5-volt USB output (one with two amps for bigger devices), and a handy LED flashlight, and this sucker is incredibly useful. Keep in mind that the bigger the battery, the bigger the size: the dimensions on Woot put it at about the same volume as a small paperback book and 3/4 of a pound. It includes a standard MicroUSB cable, plus adapters for Apple Lighting and 30-pin connectors.

This is Woot's main sale for today, so get on it fast - useful items like this tend to disappear rather quickly from the popular site. The sale will end at midnight Central time, even if there is remaining stock. You can pick up the Gorilla Gadgets charger in black or white.

Source: Woot.com

Michael Crider
Michael is a native Texan and a former graphic designer. He's been covering technology in general and Android in particular since 2011. His interests include folk music, football, science fiction, and salsa verde, in no particular order.

  • Alpha_Axl

    Bought! Thanks!

  • Jasper Makkinje

    US-only. Why am I not surprised... :(

    • Because’Merica

      Complaints about US only. Why am I not surprised?

      • C64

        Complaints about people complaining about people who complain about US-only . Why am I not surprised?

    • jamaall

      Wow. Crazy how a company based in the US would sell only to the US. That's downright outrageous.

      • Daniel DS

        In a matter of fact, it is outrageous, because in 2014, it's really easy and beneficial for both the manufacturer and the consumer if the company would ship their products overseas

        • jamaall

          It's not so simple. Shipping overseas does expand the company a ton. But they need to hire more people, get more warehouses, etc. It's not going to happen overnight. It still may not be practical depending on the companies goals

          • Daniel

            To kindly add to your point. There are also non-logistics-related problems that need to be tackled like considering taxable nexus, existence of tax treaties, legal liabilities, other foreign legal problems, etc.

        • JimG

          Maybe the product contains lead solder, which is banned by the European Union

    • Matthew Fry

      I suppose you shouldn't be. While Woot! is an Amazon subsidiary, it is still a small Texas based company that buys bulk lots of gadgets and resells them. The profit margins are probably paper thin just shipping stuff around the US. If Woot! ever expands out of the US it will likely be a separate operations buying separate lots.

      I understand the US-only complaints for digital goods with no distribution costs but complaining about US companies only shipping to US addresses is like complaining about a pizza place that won't deliver to your house 3 hours away.

  • CerealFTW

    I think they'd more along the lines of some 5-6 charges because of the loss in power with all external batteries

  • jamaall

    I haven't had a need for portable chargers since I got a Droid MAXX. If I had this, the best use would be to let friends with iPhones use it when their phones run out of juice!

  • ssj4Gogeta

    I don't like how battery capacities are still being stated in terms of milliampere-hours, now that newer batteries with higher-voltage chemistries are also getting popular (e.g. 3.8V for cellphones).

    Milliampere-hour is not a measure of the energy stored in a battery, but it's the unit of charge. You have to multiply it with the voltage to get the actual energy stored, which will be higher for a battery with the same mAh but higher voltage.

    For example, my laptop battery is 7800mAh but it is an 11.1V battery, making it around 87 watt-hour. The battery mentioned here is 16800mAh, but if it's only 3.8V, that would make it around 64 watt-hour.

    Why don't we measure energy in the units of, well, energy?

    • melitagnm105

      my Aunty Sienna recently got a stunning red Nissan Maxima by
      working part time online... find out here now B­u­z­z­3­2­.­ℂ­o­m

    • EE

      Ouch my brain. So much of what you said is wrong. It would take too long to correct this so ill just warn people not to believe any of your explanation.

      • ssj4Gogeta

        Well I'd love it if you'd tell me what's wrong (seriously). Thanks.
        Perhaps what you want to point out is that since the terminal voltage varies while discharging you can't just multiply it with the charge? My point is the mAh value isn't directly comparable across batteries.

  • Anthony Johnson

    Instead of purchasing this battery, I better purchase Wireless Car Charger for my Nexus 5 and Galaxy S4 Smartphone without messing up with
    wires so that I will never get powerless while travelling across the countryside.