High capacity power banks to keep your devices fully charged

The Vinsic 20,000mAh power bank has one charging input socket and two outputs. There is an LED indicator which shows battery charge remaining. It is slim and sleek with a hard plastic and aluminium casing which feels nice to hold.

It comes with one micro USB cable in the box. It weighs 1.2 pounds (544g). At $54.90, this is one of the more expensive device chargers I looked at. If you want a slim line power bank that charges your devices multiple times, this is certainly worth a look.

The Kmashi 20,000mAh power bank has one charging input socket and two output sockets, one is a quick charge 2.0 port. There is a bright LED flashlight activated by double clicking the power button. There are four LED charging indicator lights. The battery case has leatherette soft covering on the back and front.

It comes with one USB charge cable and weighs 1.1lb (499g). Although slim at just over half an inch (16mm), it is over four inches wide and hard to hold comfortably in the hand.

The EC Technology 22,400mAh external battery has one charging input socket and three output sockets. It has a flashlight which can be switched to soft or bright light. There are four power LED lights.

It comes with one Micro USB cable and it weighs 15.4 oz (437g). It is constructed of heavy plastic and feels solid and well made in the hands. The USB ports are labelled iPhone, Samsung Tab and iPad which annoy me as the description says that the ports are compatible with almost all smart devices.

The Lizone 40,000mAh Portable Charger has one charging input socket, one Surface Pro output and one USB output. There are five LED lights to indicate the level of charge remaining.

It comes with a cable for Microsoft Surface Pro3, and Pro4 and Surface books and AC adapter to charge it directly from the mains supply. It weighs 1.2 pounds (544g). This is quite an expensive charger with only one USB output, but it is definitely a must if you own a Surface Pro tablet or Surface book.

The Maxoak 50,000mAh 185wh portable charger will charge four phones and a laptop at the same time. It does not use USB but a 16.8 volt 2.4 amp cable to speed up its own charging. There are four power indicator LED lights.

It comes with one micro USB cable, ten laptop connectors and a female to female cable. It weighs 2.77lbs (1257g) which is really heavy to carry along with my devices. This juice pack cannot charge laptops that require over 5A DC current, nor Apple laptops.