Desert island tech: What you need when you're off the grid (gallery)

Why lug a toolbox around with you when you can have a toolbox that fits in your pocket or on a belt?

I'd never suggest that a multitool can take over the job of a proper toolkit, but a proper toolkit is only any good to you if you have it with you.

There are countless multitools on the market, ranging wildly in terms or price, quality, and features. Since I live by the adage of "buy cheap, by twice" I prefer to pay a little more and get a quality item. This is why I always carry a Leatherman tool with me. The company offers over 30 to choose from. I like my multitool to have a pair of solid pliers, decent screwdrivers, and a pair of scissors.

Having the ability to throw some light on a situation always makes it seem better. And when you're constantly diving under desks or delving inside PCs, having a flashlight that fits into your pocket is very handy. I prefer to go with an LED flashlight these days because they last much longer than incandescent bulbs and the batteries last a lot longer too.

There are plenty of LED flashlights to choose from, starting at the high end like Surefire, going all the way down to a cheapo plastic thing you can pick up at a gas station for a dollar.

I've just picked up a new LED flashlight – the EagleTac D25A – and it seems to tick all the boxes for me. It has variable output, it's small enough to fit into my pocket, it’s powered by a single AA battery, and it's tough enough survive daily use.

If you think you're going to be relying on your smartphone when you're in the great outdoors, it makes sense to protect it from knocks, drops, and ducks into water.

For moderate protection you could use a case like the New Trent Trentium 6L (I'm picking iPhone 6 cases here because that's what I have). But if you think you're going to have to survive a zombie apocalypse or beat a shark about the head to get it to let go of your leg, then you'll need something like the Hitcase PRO which is waterproof to 10 meters, can resist drops from up to 2 meters, and features a rail that you can attach a GoPro to so you can record your adventures.

If you live in sunny climes then a solar charger is a great way to keep devices topped up. If I can use one of these in the UK then unless you're living down a hole you should be able to make use of one!

I have a Powermonkey Extreme pack (which comes with a battery pack) and a 15W Portapow solarpanel. Both are awesome pieces of kit that have served me well over the years.

Information is power

While your main access to the web might be down, you might be able to connect using the 3G/LTE network using a dongle or hotspot device. It might not be good enough for you to stream your favourite movied from Netflix, but it can allow you to get access to news, weather and other information.

You can pick these up either from phone stores or online. Personally, I think it's best to get an unlocked on so you can pick and choose the provider you go with based on price and service in your area.

A radio might seem old-school, but there are times when it can be a lifesaver.

There are lots to choose from, but the American Red Cross FRX3 ticks all the boxes - It's robust, receives AM/FM & weather band alerts, features multiple power options (batteries, rechargeable batteries, solar, and a hand crank), features a flashlight, and can be used to charge a smartphone.

Believe it or not, you can add satellite capability to your existing iPhone or Android smartphone. Yes, that's right, you no longer need a dedicated satellite phone. What you need is a Thuraya SatSleeve.

In addition to offering support for calls and SMS messaging, the latest SatSleeves also have satellite data functionalities for emails, instant messaging, browsing and so on.

Just slide on the sleeve, and BINGO! You have a satellite phone. Yes, calls and data are going to cost you an arm and a leg (don't be surprised if it adds up to several dollars a minute depending on where you want to use your handset).

The SatSleeve comes in two flavors:

• SatSleeve for iPhone: Adaptor for iPhone 5/5s is inside the package (adaptors for iPhone 4/4s and iPhone 6 are available separately from Thuraya Service Partners)
• SatSleeve for Android: Adaptor for Samsung Galaxy S4 is inside the package (adaptors for Samsung Galaxy S3 and S5 are available separately from Thuraya Service Partners)

If you're planning on taking a notebook with you when you're off the grid then you need some form of rechargeable power pack for it. I've been using a ChargeTech Portable Power Outlet, and this outputs enough juice to keep my MacBook Pro happy. An added bonus is that I can recharge it using either the solar panel or 12V inverter.

It's easy to forget how much we rely on mains power to keep out devices running. But what do you do when the lights go out?

This is where a portable power pack can come in useful. This can be used to keep your cellphone and other gadgets charged up.

I'm a big fan of the Anker Astro external battery packs. You can get these in capacities ranging from 6400mAh to a whopping 12800mAh.

Want a way to stay in touch without having to rely on the cellular network then you want some two-way radios.

In my experience the cheap consumer radios are junk and barely work when you can see the other person, but if you invest in something a little more professional then you'll have a bit of kit that you can rely on when the going gets tough.

Motorola units get my vote every time, as they are durable, well made, and have a good transmit range.

If your power needs go beyond what a solar charger can offer then you need to think bigger. If you have the space then a gasoline generator is one idea, but you have to run this sort of thing outdoors because they are smelly and a fire hazard (I've seen one of these erupt into a giant fireball, and that's the sort of thing that can put a crimp in your day).

A safer and more flexible alternative is a 12V inverter that you can run from your car battery. One of the best inverters out there is the Cobra CPI 2575 which can push out a whopping 2500W and is kitted out with a raft of safety features.

If you live somewhere that's prone to flooding then having a waterproof bag for your gear might be a good idea. If bad weather is on the way, pop your precious gear inside a dry bag for safety.

I've used Ortlieb dry bags to keep delicate electronics dry in some of the worst weather conditions and they've never failed me.

There's no point having all this kit if you don't know how to use it.

I've seen people superglue their hand to their face, smash themselves in the teeth with a hammer while trying to put up storm shutters, struggle for over an hour trying to start a gasoline generator that didn't have any gas in it, turn an expensive tent into a fireball by trying to fill a lit stove, slice their hand open with a screwdriver, and settle down to read the instructions for some essential bit of kit as a storm approaches.

Don't be one of those people! Learn to you’re your kit in in comfort, when the lights are on and you have a favorite beverage close to hand. That way, using your kit will become second nature and you won't have to learn how to use it when you're cold, in the dark, or the floodwaters are rising.

Don't, whatever you do, just pack this stuff into a box or store it in the garage and not look at it until you need it!

Use it! Practice your skills!