Batteries – The Information Badger

A trip to the supermarket provided a reminder that without physics, chemistry, and mathematics none of our modern tech, internet, and online services would exist. Hardly a revelation, but what triggered this heightened awareness? Well, just the simple act of taking a small bag of spent disposable batteries to a recycling bin in the supermarket’s checkout area. The bin was full to overflowing with used disposable batteries from toys, clocks, TV remotes, cordless computer keyboards, wireless mice, and a myriad of other sources that use replaceable batteries as a power source. The act of depositing his spent batteries reminded the Badger that each one is actually a little capsule of physics, chemistry, and mathematics, and that our digital world depends on these subjects and batteries of one form or another.

On returning home, the Badger reflected on the science, materials, manufacturing, and recycling of these disposable batteries and whether they’ll ultimately be made redundant by newer power source innovations in the decades ahead. After all, the Titanium Citizen Eco-Drive watch on the Badger’s wrist uses solar and artificial light for power rather than replaceable batteries. It’s a technology that dates back to the mid-1970s, so it’s not new. Furthermore, the 1980s pocket calculator sitting on the Badger’s desk is also solar powered with no replaceable batteries. It’s a memento from a major 1980’s software development project and it works just as well today as it did back then! The Badger thus found himself wondering why power derived from light sources hasn’t rendered the disposable battery redundant in the last 40 years. Well, to make a functionally reliable, manufacturable, commercially viable product that has physics, chemistry, and mathematics at its core takes years of research to come to fruition. The good news is that it looks like lengthy research is bearing fruit and we may soon see a revolution that makes natural and artificial light the power source for a wide range of our devices, see here and here.

We should not be surprised that the coming years are likely to see a significant change in how our in-home devices, smart tech, and personal computing devices are powered. The use of replaceable batteries looks destined to decline. There’ll ultimately be no more charging cables, and no more trips to the supermarket to recycle spent batteries! Things, of course, are never that clear cut, but if light photons hitting panels on a home’s roof can generate electricity for household use, then it’s inevitably just a matter of time before light will power our gadgets and render disposable batteries redundant.

Fundamentally, power sources – and everything else in our modern digital world – are determined by physics, chemistry, mathematics and years of research. We should never shy away from being educated in these subjects because they – and light – are the seeds that will determine whatever we want the digital world of the future to be…

The first episode of Dr Who aired on television on the 23^rd November 1963. The series became part of the Badger’s childhood routine, although it almost didn’t! It aired on Saturday evenings, and initially the Badger’s parents didn’t think it suitable for their children to watch on the family’s black and white television. They capitulated following tantrums by the Badger and his siblings, however, on the understanding that if we had nightmares then the programme would be excluded from Saturday night viewing. We never had nightmares, but we often cowered behind the sofa when our parents were out of the room and an episode included the Daleks or Cybermen.

As an undergraduate at university years later, watching Dr Who with friends on a communal television in the Students Union was a weekly ritual, one which always led to discussions about the episode’s ‘whimsical science’ in the bar afterwards. One friend, a chemistry student who became an electrochemical research scientist in the battery industry, always asserted that the gadgets in Dr Who, the Daleks, and the Cybermen had one thing in common – a fundamental reliance on batteries! Dr Who’s still on television today and the Badger’s still in contact with his friend. In fact, we chatted recently after the Dr Who 60^th anniversary special episodes. His friend asserted the same point about batteries that they’d made all those years ago, and they added that any of Dr Who’s gadgets, cyborgs, or robots that were more than two years old needed charging multiple times a day! Since the Badger’s two-year old smartphone now needs more frequent charging than six months ago, we laughed and agreed that smartphones proved their point!

The physics, materials, chemistry and design of modern batteries is complex. According to his friend, in the coming years we’ll see improvements in how fast batteries can charge and how many charging cycles they can withstand, but not a huge change in how long they can last between charges. If that’s the case then battery life, charging frequency, charging speed and depreciation will be key criteria when buying goods requiring batteries for years to come. Depreciation is an often forgotten but particularly sobering point because after 3 years an iPhone, an Android phone, and a battery electric vehicle will have lost ~50%, ~75%, and 50% of their initial value, respectively.

Dr Who, of course, doesn’t worry about such things, but for those of us in the real-world batteries and the depreciation of the goods they power are key aspects of modern life and the cost of living. Dr Who is full of creative license and not practical matters like batteries and depreciation, and so it should be! It’s science fiction and highly imaginative escapist entertainment. It should trigger to interesting discussions about ‘whimsical science’ and batteries over a beer in a Student Union bar for years to come…

Category: Batteries

Physics, Chemistry, Mathematics and Light underpin the digital world of tomorrow…

Dr Who and the batteries…