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Best Ultra-Light and Ultra-Compact Power Banks

As their names imply, ultra-light and ultra-compact power banks are extremely convenient to carry. Although they can be very practical, they tend to have a limited charging capacity. If you enjoy trail running, rock climbing, paragliding, or trekking, these power banks are a must-have if you want to reduce the weight you carry.

1. Lightest: Attom Tech 3000mAh Portable Charger

Attom Tech 3000mAh Portable Charger

  • Capacity: 3000mAh
  • Weight: 2.11 oz/59.8g
  • Size: 8.89×53.3×83.8mm
  • Ports: USB-C and USB-A

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This Attom Tech power bank is one of the smallest on this list, measuring only 8.89×53.3×83.8mm. It fits easily into the tiniest pants pocket and may be used whenever your phone or other electronics require charging. With a weight of 59.8g, it is also the lightest power bank on our list, making it one of the most compact power banks you can buy.

Due to its reduced size, this Attom Tech portable charger has a capacity of just 3000mAh. But this is enough to charge the majority of today’s smartphones once. The charging state is shown via four LEDs.

Despite its compact size, it features two output connections, allowing for simultaneous charging of two devices. You can charge your devices via one USB-C port and one USB-A port while charging the power bank through the Micro USB port. In recent years, manufacturers have prioritized safety, and Attom Tech is no different. The Attom Tech 3000mAh incorporates an Intelligent Control Circuit that protects both the power bank and the devices attached to it from over-charging, over-current, over-voltage, and short-circuits.

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2. Slimmest: TNTOR 5000mAh Ultra Thin Power Bank

TNTOR 5000mAh Ultra Thin Power Bank

  • Capacity: 5000mAh
  • Weight: 4 oz/116g
  • Size: 123x66x6mm
  • Ports: 1 USB-A

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If you’re looking for the slimmest power bank available, the TNTOR WT-H330 is your best pick. This power bank is 123x66x6mm, making it smaller than the majority of current smartphones. In other words, it slips snugly inside the pocket of your clothes or bag. With a weight of only 116g, the WT-H330 adds very little weight to the items you’re carrying, making it ideal for those who are without access to a wall outlet for several hours during the day.

Due to the very thing profile, this power bank can be somewhat fragile, especially if bent. It is worth mentioning that the shell is entirely made of stainless steel, giving it some extra structural strength. TNTOR has included four LED indicators representing the remaining charge in the power bank, as well as a dedicated power button for turning the power bank on and off.

The weight-to-capacity ratio of the TNTOR WT-H330 is quite impressive, which is important for those looking for a compact and lightweight power bank. It sports a 5000mAh battery and a 5V/2A output through a USB-A port. To put it in perspective, it can charge AirPods 9 times, an iPhone 8 twice, an iPhone X 1.3 times, and a Galaxy Note 8 1.1 times.

Although the output port does not support Quick Charge, it is quick enough to compete with other non-Quick Charge power banks. This benefit is achieved by integrating a Smart-IC, which is capable of intelligently adjusting the output current in response to the device’s current requirements.

The WT-H330 incorporates short circuit, overheating, over-discharge, and overcharge protection to safeguard the power bank and the device it is attached to. The input port is USB-C, and if your phone has one, you may charge the power bank using its cable; nevertheless, an 11cm USB-C cable is provided in the package.

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3. Best Battery Kit: NITECORE MPB21 21700


  • Capacity: 5000mAh
  • Weight: 4.6 oz/130.4g
  • Size: Magnetic power bank: 22×23.5mm / Magnetic light: 22×53.3mm
  • Recharging time: 3.5 hours
  • Ports: 1 USB-A

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MPB21 21700, as advertised by NITECORE, is a thumb-sized power bank equipped with a natural white LED flashlight. The charger and lighting module are removable from the battery, making it highly convenient to carry. The magnetic power bank module measures 22mm in diameter and 23.5mm in height, while the magnetic light measures 22mm in diameter and 53.3mm in height.

MPB21 21700 kit accepts NL2150HPi cylindrical rechargeable battery, which has a 5000mAh capacity. In addition, the magnetic power bank module features a single USB-A port with a 5V/2A output capable of charging cellphones and other devices like GPS. Even though NITECORE concentrated on creating a lightweight, compact, and multifunctional device with the MPB21 21700, they did not overlook safety features, such as over-current, over-charge, and reverse polarity protection.

The LED flashlight emits a maximum of 80 lumens and has a beam diameter of 13 yards, making it perfect for hikers. If you’re wondering how long the 5000mAh battery will last when the flashlight is turned on, it will last 19 minutes, which is rather impressive given the kit’s size. In addition, it has an organizer case that protects the modules from being lost or damaged.

4. Best Design: POWERADD EnergyCell 5000

POWERADD EnergyCell 5000

  • Capacity: 5000mAh
  • Weight: 3.52 oz/99.7g
  • Size: 109.2 x 27.9 x 27.9mm
  • Power Output: 5V/2.4A/12W
  • Ports: 1 USB-A

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When it comes to small and lightweight power banks, cylindrical design has always been a favorite of ours. The typical rectangular compact power banks are prone to damage due to their thinness; if placed in a pocket or backpack, they may accidentally bend. Cylindrical power banks, on the other hand, are robust and will not bend.

This one measures 109.2 x 27.9 x 27.9mm and weighs 99.7g, making it ideal for hikers concerned about the amount of weight they carry on their trek. Although the design is rather basic, the build quality is quite satisfactory, and the shell is quite resistant to physical harm. In addition, it features a circular LED light that indicates the battery’s charge level.

The POWERADD EnergyCell 5000 is equipped with a 5000mAh battery. To put this into context, it can charge an iPhone Xs 1.5 times. In addition, the USB-A output is capable of supplying 5V/2.4A at 12W, which is sufficient to charge an iPhone Xs in 1.5 hours, a Samsung S9, and a Huawei Mate 20 in 2 hours. The intelligent MCU Controller embedded in this power bank is tasked with detecting and supplying the connected device’s power requirements to securely and swiftly charge it.

5. Highest Capacity: Anker PowerCore 6700

Anker PowerCore 6700

  • Capacity: 67000mAh
  • Weight: 4.6 oz/130,4 g
  • Size: 96×42.9×23.1 mm
  • Power Output: 5V/2.4A/12W
  • Ports: 1 USB-A

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The Anker PowerCore 6700 is a portable power bank manufactured by Anker, a well-known name in the battery and charger industry. With dimensions of 96×42.9×23.1 mm, it is smaller than the majority of smartphones on the market today, fitting comfortably in a trouser pocket. It weighs 130,4g and adds a negligible amount of weight to anything else you’re carrying. Unlike the other power banks on our list, this one has a grainy surface that prevents slippage and scuffs, allowing it to seem brand new for an extended amount of time.

The battery capacity of this power bank is 6700mAh, which is adequate to last you a day without access to a wall outlet. In addition, the battery is capable of charging the Samsung Galaxy S7 1.3 times, iPhone 7 for two times, and iPhone 7 Plus 1.3 times.

As with all other Anker power banks, the PowerCore 6700 has PowerIQ. This technology is capable of recognizing the connected device and charging it at a rapid rate. Furthermore, the multi-protect mechanism implemented on this device ensures that no damage occurs during high-speed charging. However, it is worth noting that the PowerCore 6700 is incompatible with some Bluetooth headsets and GPS devices with an input current of less than 50mA. Additionally, this power bank does not support Qualcomm Quick Charge, Power Delivery, or PowerIQ 2.0.

Pros and cons of ultra-light and ultra-compact power banks


  • As their names imply, ultra-light and ultra-compact power banks are convenient to carry and take up minimal space.
  • They are small enough to fit in any pocket or wallet.


  • As previously stated, due to the compact size of these power banks, the battery capacity is also limited.
  • Ultra-light and ultra-compact power banks cannot be used to charge equipment that requires a lot of power, such as laptops, due to their low power output.
  • Due to their compact size, they’re easy to misplace.
  • They usually don’t come with fast charging technologies.

All-in-all, these power banks are great for activities or situations in which size and weight are paramount. They’re a good option for nature lovers that want to travel light, but they also excel as everyday carry items. The obvious setbacks are a lack of charging capacity and a lack of fast charging features. If you can manage to oversee these shortcomings, then these mini power banks are just the thing you need.