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6 of the best solar-powered chargers for smartphones and tablets (and one nifty keyboard)

Powertraveller Powermonkey eXtreme

A solar unit that takes about 14 hours to charge up (and works even under overcast skies), this 9,000mAh capacity battery (HK$1,490) can output to a smartphone and tablet. A Powermonkey Aquastrap accessory makes the two units waterproof while in charging position.

Available at oasistech.com.hk

Hybridlight Puc expandable lantern/charger

Great for camping trips and outdoors activities, this solar-powered lantern, flashlight and portable charger (HK$271) contains a 4,000mAh portable battery that’s good for fully recharging a

phone.

Available at hybridlight.com

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Goal Zero Venture 30 Solar

A regular portable battery supplied with a separate solar panel, this dual device (HK$1,320) contains a built-in microUSB cable, so it’s perfect for Android devices. The 7,800mAh battery is water resistant, making it good for use outdoors.

Available at goalzero.com.

BioLite SolarPanel 5+

Ideal for camping, this superslim solar panel (HK$1,295) has a small sundial in the corner that together with a stand makes it easy to aim at the sun to maximise power generation. It includes a built-in 2,200mAh battery that’s good enough to top up a phone battery.

Available at overlander.com.hk.

Logitech K750R wireless solar keyboard

For those out in the wild wanting to write using a phone or tablet, this wireless keyboard (HK$539) uses a built-in solar panel to stay charged for at least three months. Available at yohohongkong.com.

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Instapark Mars20S solar-powered generator

If you plan to go off-grid for weeks at a time and need to recharge phones, tablets and laptops several times over, this generator (HK$3,658) has an enormous 145Wh lithium battery inside. Also contains a flashlight and an SOS beacon light. Available at http://prubuy.hk.

Voltaic solar backpack

Perfect if your commute involves a long walk, this backpack (HK$1,545) with a 6W solar panel will trickle-charge a phone, tablet or camera. The solar panel is removable, and the bag also includes a padded laptop sleeve. Available at voltaicsystems.com