Choosing which devices to carry when on the move can be challenging, so the latest solution from Cayllee may prove a valuable combination for many, particularly women. The Knight Power Bank combines a 5,200mAH power pack with a powerful torch, a deafening alarm and a built-in SOS signaller.

Constructed with a solid unibody frame, coated with a comfortable soft-touch surface, and available in light grey or cyan, the Knight Power Bank is a genuinely wide ranging solution. The 5,200mAH battery (nearly 3x that in the iPhone 6) is charged through a micro-USB cable (included), and offers a full-sized 2.1A USB output socket to connect to pretty much any mobile device. An array of four LEDs gives a charge status indication when the device is turned on.

Stockholm-based MyFC presents the latest version of its hydrogen fuel cell technology at Mobile World Congress 2015-- the Jaq, a slim and portable backup battery product usable with all USB-compatible devices.

The technology inside Jaq is more or less similar to that found in the previous MyFC fuel cell product, the PowerTrekk. The charger mixes salt and water (in the shape of a cartridge) to produce hydrogen. In turn, the hydrogen produces electricity, with the only by-products being heat and water vapour. The only difference is the Jaq is a much slicker rubberised sleeve, while the cartridges are slim and credit card-size.

Accessory maker Speck announces Samsung Galaxy S6 and S6 Edge versions of its toughest smartphone case, the MightyShell-- promising twice the standard military grade-protection from everyday drops and falls.

According to the company, the MightyShell protects from falls up to 8ft (2.4m), whereas the military standard tests using half that height, 4ft (1.2m). To do so, the MightyShell uses 5-layer technology within a from-fitting case to strengthen devices against direct impact.

The MightyShell is available in 5 colours, and well as in MightyShell + Faceplate versions with TrueTap technology for superior touchscreen response and display protection.

Microsoft launches a more portable version of its cross-platform lightweight Universal Mobile Keyboard at Mobile World Congress 2015-- the self-descriptive Universal Foldable Keyboard.

Like the Universal Keyboard the Foldable version is compatible with all iOS, Android and Windows devices and, like the name suggests, users can fold it in half for easy stowing in bags or even jacket pockets. Magnets hold the keyboard closed once folded.

It is all of 11.5mm thick when folded, and unfolds into a full-size keyboard measuring 29 x 12cm. Users can pair it via Bluetooth with up to 2 devices, with a button handling the switching between devices.