How to Keep Communication Devices Running During Summer Heatwaves

Heading into summer, most of us prepare by packing extra water, planning early starts, and chasing any patch of shade we can find. But what about the tools we rely on to keep everyone connected?

When things heat up, communication devices can start misbehaving. Radios and satellite phones that work fine all year can start draining faster, overheating, or conking out without warning. Battery life takes a real hit, especially when equipment is left in the ute or out in direct sunlight.

In places like the Bay of Plenty, where summer can swing from warm to stinking hot fast, the risk goes up. It's not about fancy tricks or buying all new gear. It's about good habits, smart use, and knowing what heat can really do.

Why Heat Makes Batteries Give Up Early

Ever tried to use a phone left on the car dash all morning? It’s not just you doing it tough in the heat. That feeling of burnout hits our gear too, especially the batteries.

Here’s what happens and why it matters:

1. Heat speeds up chemical reactions inside a battery. The more heat, the faster that battery runs out of steam. What should last a full shift might only hold on for a few hours.

2. If devices keep overheating, it’s not only power loss you’ll deal with. Long-term heat breaks down battery parts. That means the damage sticks around, even once the temperature drops.

3. Leaving gear in vehicles or metal toolboxes in the sun turns them into tiny ovens. We’ve seen it: devices look fine outside but start misfiring soon after.

So, if your radio's going flat before lunch, the heat may be the real culprit.

Smart Habits That Help Batteries Last the Day

Hot weather isn’t going away, but bad habits can. A few small switches can help your gear survive the heat and keep battery life strong all day.

We like to keep it simple. Here’s what works:

1. Keep radios and phones out of direct sun. Use the shade from a tree, the cab, or even a high-vis shirt tossed over the top. Cooler devices last longer.

2. Turn off the stuff you don’t need. Bright backlights, loud speaker tones, or added scan features might be useful, but they chew power.

3. Use routines. Charge gear during lunch breaks or while fuel is being sorted. Make cooling breaks for humans and batteries part of how the job runs.

Good habits become second nature, and when they do, your batteries thank you by sticking it out through the heat.

Choose the Right Tools for Hot Jobs

Not every device is built to handle tough outdoor heat. Some are made for desk work, not bush work. If gear keeps failing midday, it might be time to look at what you’re using.

Here’s what helps in the hotter months:

1. Pick radios and devices that are built for field use. Extra seals, thicker casings, and tougher battery designs keep them running when the temperature climbs.

2. Long-life batteries are worth it. Bigger charge capacity means fewer changes during the day and less stress on worn batteries overheating when they’re running on empty.

3. Carry spares if possible. Whether that’s a backup handheld radio or a second fully charged battery, you’ll thank yourself when something suddenly dies.

Reliable gear isn’t about bells and whistles. It’s about lasting long enough to get the work sorted safely. We carry a wide range of fixed and handheld two-way radios from brands such as Motorola, Hytera, Tait, and GME, including IP67-rated units that are dustproof, waterproof, and built to handle harsh New Zealand conditions. Some models offer extended battery performance of around 18 hours or more on a single charge, and compact UHF CB handsets with up to roughly 24 hours of battery life, so crews can work long summer shifts without constantly recharging or swapping devices.

What a Failing Battery Looks (and Sounds) Like

Sometimes the warning signs are small. A buzz here. A restart there. But when communication cuts off in the middle of a job, it’s a big problem.

Look out for this kind of behaviour:

1. Your device shuts down or stops transmitting, even though it was just charged.

2. Signal range is poor or keeps dropping, which can mean a weak power supply.

3. Charging takes longer than usual or doesn’t get to full power.

When you see it, don’t ignore it. Heat damage builds slowly. What starts as a minor glitch could become a complete shutdown.

And here’s why that matters. Missed check-ins or silenced radios can leave workers stranded. In remote spots, that’s not just a hassle, it’s a hazard.

When the Weather Gets Serious, So Should You

Sunny days seem harmless enough, until they aren’t. A scorcher in the Bay of Plenty can bring heat, moisture, and full sun for most of the day. That combo wreaks havoc on batteries and bodies alike.

When it really turns up outside, step things up on site too:

1. Set up shaded rest spots and gear areas. Even a tarp strung between utes works better than full exposure.

2. Rotate use of handheld gear. Swap out radios mid-shift to avoid single units overheating from constant use.

3. Charge inside where it’s cooler, not on metal surfaces baking in the sun.

When weather turns punishing, it's the small prep that often prevents the big failures.

Don’t Let Heatwaves Cut the Line

Summer’s great until the heat starts costing time, connection, or safety. Batteries drain too fast, checks are missed, and suddenly your most important tools are silent when you need them most.

But it doesn’t have to be that way. A few small shifts in how we treat our gear can do the trick. Protecting devices from the sun, turning off what we’re not using, and using the right kind of gear for the job all help keep communication steady.

With strong habits and smart choices, battery life can make it through the hottest days, keeping teams clear, connected, and on track to finish safe.

Radios cutting out before the end of your shift might mean the battery is to blame. We offer a wide range of devices built to stand up to New Zealand’s summer conditions and help extend your battery life well beyond the first half of your shift, and at Mobile Systems Limited we know what tough days on site can do to your gear. Whether you need spares, replacements, or advice, we are ready to help keep your comms running all day so give us a bell to choose the right setup.