ZMI PowerPack Pocket-Sized Anti-Slip Power Bank

Last updated date: April 29, 2022

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ZMI PowerPack Pocket-Sized Anti-Slip Power Bank

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We looked at the top and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best you should buy.

Update as April 29, 2022:
Checkout The Best Power Bank for a detailed review of all the top .

Overall Take

This power bank can charge up a range of devices through USB-A or USB-C inputs. These can accommodate everything from fitness bands to smart watches. The lightweight design makes it easy to carry.

In our analysis of 31 expert reviews, the ZMI PowerPack Pocket-Sized Anti-Slip Power Bank placed 13th when we looked at the top 15 products in the category. For the full ranking, see below.

From The Manufacturer

Mobile devices have become an essential part of our lives. While enjoying the use of mobile apps on-the-go, we inevitably grow more and more dependent on them. As a result, running out of battery not only causes frustrating and at times difficult circumstances, but also could disrupt our ability to function. Since 2014, ZMI has been working to meet this challenge and has cumulatively sold over eighty million portable chargers/battery packs worldwide. With the ZMI’s high-capacity, fast, and reliable charging solutions, you never need to worry about running out of power; you are in charge, anytime, anywhere. The PowerPack 10K works with: iPhone XS · XS Max · XR · X · 8 · 8 Plus · 7 · 7 Plus · 6 · 6 Plus · 6S · 6S Plus · 5 · 5C · 5S · 4 · 4S iPad 2 · 3 · 4 · Air · Air 2 · 2017 · Mini 2 · 3 · 4 Samsung Galaxy S10 · S10+ · S10e · S9 · S9+ · S8 · S8+ · S7 · S7 edge · S6 · S6+ · S6 edge · S6 edge+ · S5 · S4, Galaxy Note8 and earlier (Note: Does NOT fast charge Google phones) Kindle Fire HD · HDX LG Tribute HD · Stylo 2 3 · K7 ·K8 · Rebel · X venture · Q8, V30 · V20 · G6 · G5 · G4 · G3 Sony Xperia XZ · XZ Premium · XZ1 · XZs · XA Ultra Fitbit fitness trackers DJI camera drones Bluetooth headphones and more. NOTE: We strongly recommend you use the original Apple charge cable (not included) to charge iPhone/iPad. AC adapter not included. NOTE: iPhone/iPad and other non Quick Charge devices will charge at normal speed with the fast charging indicator LED OFF. USB PD not supported. Does NOT fast charge iPhone 8/8 Plus/X, Pixel/Pixel XL/Pixel 2/Pixel 2 XL, or Moto Z. LIMITATIONS: USB PD Not Supported. The PowerPack 10K can charge Nintendo Switch via a USB-C to USB-A cable, but the AC power adapter that comes with Nintendo Switch does not charge the PowerPack 10K. Does not fast charge Pixel/Pixel 2/Pixel XL/Pixel 2 XL. Does not turbo charge Moto Z series. ZMI PowerPack 10000 (Model: QB810) Specifications Battery Type: Lithium-polymer cell Cell Capacity: 10,000 mAh × 3.85V = 38.5Wh Operating Temperature: 32° to 113°F (0° to 45°C) Input Port Type: Micro-USB or USB-C Output Port Type: USB-A Input: (QC 2.0) 5V/2A, 9V/2A, 12V/1.5A Output: (QC 2.0) 5.1V/2.4A, 9V/1.6A, 12V/1.2A (Voltage/current levels supported by devices are automatically detected and adapted to.) Fast Charge Protocols Supported: QC 2.0, BC 1.2 Dimensions: 5 × 2.71 × 0.5 in (127 × 69 × 12.7 mm) Weight: 6.24 oz (177 g) person High-Capacity, Pocketable, Fast The ZMI PowerPack 10K is the thinnest and lightest battery pack on the market. It’s 40% thinner than similar products and weighs in at just 6.2 ounces, yet still packs a ton of power. On one full charge, the PowerPack 10K can charge an iPhone 7 3.7 times, a Galaxy S6 3 times, or an iPad Air 2 once. It fits easily into your pocket or bag and is encased in an anti-slip surface, making it the perfect charger for your on-the-go lifestyle. Versatile Charging Modes The PowerPack 10K caters to the needs of tablets, smartphones, smart watches, Bluetooth earphones, and Fitbits by offering three charging modes: Fast-charge (QC 2.0), Normal, and Low-power. It is rechargeable via either Micro-USB or USB-C port; fast recharging (QC 2.0) is enabled if an 18W QC 2.0 USB power adapter is used (not included). Recharge Time: 4.2 hrs with 18W QC fast charge plug; 6.2 hrs with 5V/2A plug like iPad plug; 11-12 hrs with 5V/1A plug like stock iPhone plug. tearup Efficient, Reliable, Safe, and Widely Compatible ZMI’s proprietary charging technology ensures that your PowerPack 10K maximizes energy conversion efficiency on every single charge. We use the highest-grade battery cells and components to deliver the same charging capacity at 10% less weight than similar products. And the PowerPack has multiple layers of protection against overheating short-circuiting input overvoltage/reverse-voltage output overvoltage/overcurrent battery overcharge/overdischarge Moreover, the PowerPack employs hardware-level cell overcurrent/short protection and a reset button as additional safeguards. Box contents In the Box Your purchase includes: 1x ZMI PowerPack 10K, 1x Micro-USB to USB-A cable for recharging the PowerPack, and user guide. Not Included in the Box QC 2.0 USB wall charger and Lightning cable for iPhone/iPad are sold separately. You will need a USB-C cable/adapter (Not Included) to charge: Samsung Galaxy S10/S10+/S10e/S9/S9+/S8/S8+/Note8 LG G5/G6/V20/V30/Q8/X venture HTC U11/U Ultra/10 Sony Xperia XZ/XZ Premium/ XZ1/XZs Moto Z/M (Turbo Charge or TurboPower NOT supported) And other devices with USB-C power input

Expert Reviews

Expert Summarized Score

4 expert reviews

User Summarized Score

1,435 user reviews

What experts liked

It can charge most phones up to 3 times and can also charge tablets, smart watches, and fitness bands.
- BestReviews
The USB-A port uses Quick Charge and also has a standard charging rate of 5V/2.4A. The power bank uses two input ports with one USB-C and another Micro-USB input too. Has a very slim fom factor which makes it easier to be portable with.
- Charger Harbor
Two input ports, including USB TYPE C. Three charging modes (fast, normal, and low-power). Slim, lightweight and portable design. Highly compatible with a wide array of USB-powered devices.
- Power Bank Expert
With a sleek and stylish design, the ZMI PowerPack 10K is ideal for people who want a power bank that can easily fit in a backpack. With the ability to charge multiple devices to 100% yet still reserve some battery life in the power bank, it’s convenient to have.
- Power Your Gadget

What experts didn't like

While it has a fast charge option for capable phones, it doesn't have a second port for the option.
- BestReviews
The USB-C port cannot be used as a output.
- Charger Harbor
Does not offer USB TYPE C output.
- Power Bank Expert
Gets warm easily. Poor longevity. Half-charges phones after time. Requires user guide for setup.
- Power Your Gadget

An Overview On

Tablets. Smartphones. Smartwatches. Laptops. We’ve got so much gear these days that sometimes we can forget that these devices need power — until that power gauge goes into the red. When that happens, you understand how essential a good power bank can be, especially if you’re on vacation or miles away from a convenient wall plug in the wild.

In situations like those, a good power bank can literally be a lifesaver. But exactly what are they? First, let’s talk about what they are not. While power banks can charge your phone or other devices, they are not technically chargers. Chargers are just conduits between your phone and a power source (typically a wall outlet). Power banks are the power source, packing an internal battery that your gadgets can hook up to and feed on.

Those internal batteries can be one of two types: Lithium-ion (usually listed as Li-Ion) or the less common lithium polymer (Li-Po).

Lithium-ion batteries were first developed in the early 1910s and they are still in common usage today — with several improvements to those first crude models. These batteries can pack a lot of power into a relatively small package, and they’re relatively cheap to produce. They’re not without their drawbacks, however. Lithium-ion batteries will degrade more easily over time, and can even be unstable — although that’s more likely to be the fault of the device and not the battery inside it. (For a prime example, look up the 2016 woes of Samsung’s Galaxy Note 7).

Lithium polymer batteries, by comparison, are less likely to leak electrolytes and therefore a bit safer. They’re also lighter, more flexible and can be made much thinner. So why aren’t they the standard? Like most technology that’s smaller and sleeker, they are significantly more costly to make. Nor are they necessarily better, depending on your energy needs. In general, they can’t pack the same amount of power into as small of a space as lithium-ion, and their ability to recharge can degrade slightly over time.

Mind you, looking at the type of battery you have won’t tell you how much energy your power bank can supply. For that, you’ll have to look at the battery capacity, which is measured in mAh. That stands for milliamp hours, and it takes a bit of explaining. Milliamps are a unit of measurement for electric current equal to one-thousandth of an ampere. Milliamp hours will tell you the energy capacity of a battery by telling you how long your power bank can supply a certain amount of energy. In terms of charging up your phone, let’s say it has a battery capacity of 2,000 mAh. If you have a power bank with a battery capacity of 10,000 mAh, it could charge up your phone five times without needing a recharge itself. Simple division: 2,000 times 5.

Enjoy the practice, because you may want to do a little more easy math before shopping. Take a look at all your devices and add up their own battery capacity. That’s the number you’ll probably want as a minimum for your own power bank, provided you plan on charging multiple gadgets with it. The battery capacity for smartphones can vary wildly (especially among older models), but the current iPhone 11 has a capacity of over 3,000 mAh. The latest tablets have batteries that can hold from 5,000 to 9,000 mAh or more. Laptops understandably take a lot more power, so you’ll need a high-end power bank with at least 20,000 mAh if you want more than one full charge at a go.

That’s well and good, but capacity isn’t everything. When you’re on the go, sometimes you don’t have all night to charge up your gear. When you need to know how fast your power bank will deliver a charge, look at the output stats. They’ll be measured in two numbers: Volts (V) and amps (A). Without getting into the electrical weeds too much, these two numbers are multiplied together to get the full output possible, in watts (W). You’ll see proprietary fast-charging tech like Qualcomm’s Quick Charge advertised for certain devices, but those numbers are the bottom line. And bear in mind they may not be the rate at which your device actually charges: Speed is limited by the cable that you use to connect your phone or tablet to the power bank. If the power bank can deliver a charge at 5V / 3A but the cable is only capable of handling 5V / 1A, you’ll charge at the slower rate.

Of course, your power bank itself will eventually have to be recharged. Look for the input stats to get a sense of how fast it can get to a full charge when connected to a standard wall outlet.

So much for the interior stats. One feature that will be immediately obvious in your power bank is how many output ports it has. The more ports, the more devices you can charge simultaneously. Multiple ports might be a major attraction for multi-taskers who like to take all their gear on the go, but all ports are not created equal. USB-A ports will be standard, but there have been several upgrades to that standard over the years. Look for ones with USB 3.0 compatibility or higher, as they’ll be able to take advantage of higher-speed cables.

Some power banks might be capable of wireless charging, and may even be able to do that while providing power to other devices through the USB ports. Just know that the power it puts out will be split between those devices and may not charge any of them as fast as it would solo.

Of course, all this functionality doesn’t mean much if your power bank weighs as much as a generator. Yes, modern power banks keep a relatively slim profile. Some may be as small as your smartphone itself, or even smaller. Heads up, though: they may be heavier than they look — even ones that have slimmer lithium polymer batteries. Take a look at the weight before purchasing and figure that into your travel plans.

Speaking of travel benefits, many power banks can make themselves useful for more than just a passive charge. Some can use their batteries to power a flashlight in case of emergencies or will heat up just enough to become a makeshift pocket warmer in frigid weather. Those perks can make a lot of difference, and turn a forgotten backup device into a handy hiking buddy.

The Buying Guide

  • So you’ve got your power bank. All set to take your gear on the road? Not so fast. Make sure you’ve got the charging cables to go with it. Strange as it may seem, many power banks won’t provide the connectors that actually attach their battery to the device it needs to charge. Check that you’ve got a cable to match the port type supplied on your power bank (ideally one that matches or exceeds the output speed).
  • Make sure you also charge up the power bank before you use it for the first time. Many banks will come with only a minimal charge right out of the box, in order to preserve the battery.
  • A good power bank can last for many years if it’s properly stored. Different models may boast of their durability, but no matter what the casing, lithium batteries and moisture do not mix. Keep it out of the rain for extended periods, or submersion in water. A more common pitfall is heat or cold. Your power bank will perform best at room temperature, and it definitely will suffer if left out in a hot car for days on end (or a poorly insulated one in winter, for that matter).