Power Theory Credit Card-Sized External Battery Charger Review

Power Theory Credit Card-Sized External Battery Charger

What I say:

I am always on the go and need away to charge my phone and I don't always have a place to plug it in. Power Theory Credit Card-Sized External Battery Charger makes charging fast and easy. It is so small and portable that it fits in your pocket and takes up little room. It's small but boy is it a powerhouse. The charging time is 3-4 hours and the weight of the device is only 2.1 oz. I love the fact that the charger has it's very own plug so you don't have to carry anything extra around and also it plugs back into the device so it is out of the way. This Credit Card-Sized External Battery Charger is perfect in every way, small, compact, portable, quick and fast. It's well built and made to last! It takes less then 30 minutes to charge my Galaxy s3. I honestly could not be able to live without this now. Power Theory Credit Card-Sized External Battery Charger makes it easy to stay charge and stay connected!

  • THE POWERCARD - A PERFECT COMBINATION OF POWER, SIZE & WEIGHT. Many products claim to be "the world's thinnest, lightest power bank". Usually that just means you will not have enough juice to adequately charge your phone. If you compare our ratio of weight (60g/2.1oz), to compact size (3.75 x 2.4 x 1/4 inches) to powerful charge (2500 mAh Real Capacity) you will not find a better
  • external battery charger for emergency situations or
  • those days where you need a little extra power.
  • NO MORE FUSSING AROUND IN YOUR BAG FOR ANNOYING CHARGING CABLES. A portable battery charger is not really portable if you are forced to carry charging cables that easily break or tangle. Our smartly designed external power bank has a built-in Micro USB and Apple Lightning Cable meaning you have everything need to charge your phone when you need it the most.
  • NEVER RUN OUT OF BATTERY POWER AGAIN. External battery packs are a great idea in theory, but we found we never seemed to have them on hand when we needed them the most. To solve this we designed the PowerCard. Our lightweight design means you can always carry the charger with you whether you are out on business, travel or at a restaurant. Our A+ Li-Polymer
    battery cell (2500 mAh) means that you can depend on the PowerCard to fully charge almost all smartphones.
  • HONEST TRUTH ABOUT BATTERY CAPACITY. We believe in our product and also in educating you the customer. We use a lithium polymer battery that is safer and performs better compared to lithium ion (li-ion) batteries found in slightly cheaper lipstick style chargers. When you transfer this power from the charger to the smartphone a certain amount of energy is lost in the process. Most power banks (including ours) perform at around 60%-70% of their rated capacity. This means our device can still mostly charge even the most demanding iPhone or Android phone.The PowerCard works great for iPhone 6 5S 5C 5, iPad Air Mini, Samsung Galaxy S5 S4 S3, Note 4 3, HTC One M8 Desire, Google Nexus 5 6, LG G3, Motorola Moto G X, Sony, Huawei and other Smartphones and Tablets that can be charged via MicroUSB. Note: It does not work with older Apple devices like the iPhone that use the old bigger Apple connector.
  • IRONCLAD GUARANTEE - It is simple. You have a an issue with one of our products and we will fix it or 100% money back! Just check our 100% User Feedback Score!

Product Description

The Problem:

People love their Smartphones - until they run out of power. Usually at the worst possible time: Traveling. Outdoors. At a party. At a meeting. During a blackout. Or having car trouble.

The Solution:

With the PowerCard you always have reserve power available, in your wallet, pocket or bag. The 2500mAh premium battery is big enough to charge your phone. It has been engineered with a new "S-Power" chip for intelligent charging and extra safety protection.It turns off automatically and charging is easy. Just plug in the Micro-USB or Lightning adapter to your phone and you will see the LED light turn red as it rescues your phone from battery death.

Size Does Matter

It's almost the size of a credit card, only 1/4" (6.3mm) thick and weighs just 2.1 oz. (60g). You can also say goodbye to annoying cables and bulky portable chargers.


Size: 3.75 x 2.4 x 1/4 inch (95 x 62 x 6.3 mm)
Capacity: 2500mAh / 3.7V
Input: 5V / 1A (max)
Output: 5V / 1A (max)
Weight: 60g / 2.1oz
Recharge Time: 3-4 hours
Cycling Time: 500 times or more


1 * Power Theory PowerCard PTX-2500 (2500mAh)
1 * User Guide
1 * Apple Lightning Adapter
1 * Amazing Lifetime Customer Support

Our Guarantee

Power Theory is a small business founded by tech enthusiasts who are 100% committed to customer satisfaction. Give us a try and we will make it worth your investment! If you have a an issue with one of our products and we will fix it or 100% money back. 

I received this product in exchange for an honest opinion. Regardless, I only recommend products or services I use personally and believe will be good for my readers.

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