TYLT ENERGI 2K Travel Charger

The TYLT ENERGI 2K travel charger, on paper, makes sense. It's got prongs that fold out of the body and straight into a wall charger, so there's no mucking about with USB cables and separate charging warts. Just plug the battery into the wall and charge away. We get that. And if you're an iPhone user, that makes sense. Who wants to carry around a microUSB cable that you might well have no other use for?

But if you're using any other smartphone — Android, BlackBerry or Windows Phone — there are better options for keeping charged up while on the go.

The reasoning is pretty simple. Three-fourths of the smartphone platforms all use microUSB cables. So you've already got them — and their chargers — laying around. It's just not that difficult to dig them out and plug in.

TYLT ENERGI 2K Travel Charger

And that brings us to the other reason we'd probably skip this charger: It's a mere 2,200 mAh. And while that'll get you a full charge of an iPhone, it's a little less capacity than what's in the Samsung Galaxy S5, so you won't get a 100 percent charge. For about the same money $40 retail — you can get something about the same physical size, with a far greater charging capacity. (The Samsung external battery I have laying around my bag is 9,000 mAh, and you can easily find other options for even less money online.)

TYLT ENERGI 2K Travel ChargerTYLT ENERGI 2K Travel Charger

So the question you have to ask yourself is how much do you want to skip carrying around a microUSB cable and charger? If you're on an iPhone, the TYLT ENERGI 2K may make sense. For everyone else, there are better options.

More: TYLT ENERGI 2K; Kickstarter campaign (now ended)


Reader comments

TYLT ENERGI 2K makes sense for iPhone users, not so much for anyone else


2200mAh is miniscule for Android phones.

Not even enough to fully charge an HTC One M7, and just enough to charge a Galaxy S3.

My RAZR M has a 2000 mAh battery.

Posted via Droid Razr M on the Android Central App

He means nowadays Android phones not old ones

Posted from my Nexus 7 2013 running Android L or Samsung galaxy S5

Not to mention, efficiency would be ~85%, plus the fact that your phone is (normally) still on, using power while it's charging. 2,200 mAh would be *just* enough for one full charge of an iphone, and then only if it's on standby.

Here is how I got 3 battery chargers for $10 each. Go to your local radio shack and look around the for them a lot of the time they are under the front of the check out next to the batteries. One of mine had a mini USB on it and with a bit of hacking I got a new end on it and it works great.

I have battery packs, but i backed this since its both the plug and a battery. Of course there are bigger batteries out there but for $20 (backer price) its a nice replacement for a traditional wall charger

I still have an old Blackberry micro USB from my old Tour behind my couch that's still in use (albeit it's showing it's age on current power hungry devices..) . As for "on the go" I do love my ultra convenient replaceable batteries and ALWAYS have a spare or three on me at all times.

Less than 1 charge for $40? Even for iPhone, that's not worth the price. You can easily find a 2,200 mAh for $10-20.

it gets the job done and it has a USB cord built in. Adults like me aren't playing games all day like you.

"Adults" rarely feel the need to explain how "Adult" they are. And "Adults like you" sound like a really boring stuck up bunch of people.

You sound like youre that guy on Halloween who gives kids toothbrushes
Posted from my Nexus 7 2013 running Android L or Samsung galaxy S5

I found on a daily deals website these from tylt for $25. I bought 2 (which is full retail price for 1) and they are one of my favorites. I don't use my mophie anymore coz yeah, I don't like having to carry around a USB cable.


Posted via Android Central App

Of, if you're not stuck on iPhone, just buy a phone that lets you swap batteries. Spare batteries that go in your phone are a LOT easier to carry than any of these external battery packs. And, you don't have to worry about what to do when your phone is a year old and the original battery has lost 20 - 30% capacity.

Its also worth noting that battery charging is only about 70% efficient - that is to say that for every 10 joules of energy you put into it, only 7 joules stick around as usable charge for later (the other 3 turn into heat).

The following calculations assume that the internal capacity of the battery in the charger is 2200mAh (it is conceivable that they mean that it has a *charging capacity* of 2200mAh though, which is slightly different).

For reference, a phone battery is (give or take) about 4 volts, so 2200mAh (2.2Ah) @ 4v = 8.8 watt hours = ~ 31000 joules.

To get 31000 joules of energy into the battery pack takes about (31000/0.7) = 45000 joules of energy from the wall.

Doesn't seem like a huge deal, but you then have to factor in that you're using THAT battery to charge another battery at 70% efficiency and you only get (31000*0.7)= 21000 joules of energy into your phone.

At 4v this means that the charging capacity is about 1571mAh- less than 1600mAh available for your mobile device to actually use.

You'd need two of these to charge a Note 3 or LG G2 from 0 to 100%.

Anker Astro Slim: 6000 mAh, full size USB port + built in micro USB cable (this is really key), same size as my Nexus 5. One of the best $35 or so I ever spent. I easily get two full charges out of it so not using it for a few weeks or not charging it religiously isn't a big deal, it's always handy when I need it and thanks to it's shape it slips easily into a second pocket (or the same pocket as my phone) compared to other battery packs that are more boxy. Anker's got great support too from what I've seen.

I love the thing, only improvement would be a sleeker microUSB plug as the current one is a little tight with a TPU case, but it works fine as is (might not with thicker cases). Might only yield about one charge + 2/3 of a second charge on phones with larger batteries near 3000mAh, but given the form factor that's still really solid IMO. I had a different Anker without a built in cable before, shaped more like a candy bar than a phone, I was satisfied with it but the Slim is so much more usable.