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However, while many inside and outside of law enforcement are eager to integrate uncrewed technology in policing, others have expressed concern that the vehicles may compromise privacy and civil liberties. For example, a recent report from the American Civil Liberties Union (ACLU) stated police “programs are beginning to proliferate with little oversight or accountability.” The group went on to say, “It’s important that we don’t sleepwalk into a world of widespread aerial surveillance, that communities think very carefully about whether they want drone surveillance, and, if they decide to permit some operations, put in place guardrails that will prevent those operations from expanding.”

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It’s that last item—faster charging times—that will be addressed in the remainder of this article. There are two main Li-Ion battery technologies used in forklifts, each with its own unique characteristics, advantages, and limitations.

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If switching from older lead-acid technology, you’re making a sound business decision on several levels. It doesn’t matter if you have a single forklift working a single shift, or a large fleet working multiple shifts, upgrading to Li-Ion batteries offers you many benefits over lead-acid.

Think about it for a minute. When will you ever completely drain your battery? If you’re seeing that happen, you’ve likely got a personnel problem, not a battery issue. One of your drivers is not taking advantage of opportunity charging.

An LFP Li-Ion battery, on the other hand, normally has a charging rate of between .5 to .8 C. What this means is that the battery will charge from 0% to 100% in about two hours at .5C and perhaps closer to 1-1/2 hours at .8C. That seems significantly slower, a potential downside to LFP batteries.

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High amperage burns hot. Need a practical example? Turn on a 100-watt incandescent light bulb and let it sit for a minute. Then, unscrew it while it’s still powered.

Any form of flowing electrical current generates heat. That’s a fact. It’s an immutable law of electricity that must be accounted for and dealt with. The higher the amperage or current, the higher the heat.

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So obviously, the sales rep’s biggest draw is that the NMC will charge completely in half the time of the LFP Li-Ion battery. The cost to do that may be slightly higher, both for the battery and the accompanying heavy-duty hardware required.

LFP, or Lithium Iron Phosphate, has been around for quite some time. Because of that, it has a better track record for reliability and other factors than its Li-Ion battery counterpart, NMC. NMC, or Nickel Magnesium Cobalt Oxide batteries, are a newer technology.

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News reports from across the US and around the world point to an increase in the use of drones and related systems in public safety and law enforcement. In large cities and small towns alike, uncrewed systems are being put to work in countless ways that make citizens safer and supply more and better tools for law enforcement officials.

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The fact is that if opportunity charging is used, you’ll rarely get more than a 20-30% power drain, even in freezers and cold storage operations. Therefore, the higher charging rate of 1C for an NMC Li-Ion battery is really a non-issue. It’s just an exaggerated selling point with no real tangible benefit.

What is an important consideration is charging times during normal forklift operations. The charging rate is designated by C, which stands for charge current, not charge voltage. A battery that can be charged at 1C will go from 0% charge to fully charged in one hour. NMC batteries achieve this charging rate easily, as many manufacturers and sales reps will inform you.

If you’re reading this, you’re likely considering switching your fleet of forklifts and hand jacks to Lithium-Ion batteries. Or you might be in the market for new batteries and are looking for guidance on which Li-Ion technology to purchase.

You raise the current flow, producing more heat. That heat must be dissipated by either using larger diameter cables, more robust insulation, or a combination of both. And the connectors that join battery to cable must also be heavier made or they’ll melt.

The need for a zero to 100% charge in 60 minutes sidesteps one of the main benefits of Li-Ion batteries as a whole: opportunity charging.

Here are just a few highlights to consider before we go myth-busting on needed Li-Ion charging times. In no particular order:

When first developed, NMC Li-Ion batteries were much more expensive than LFP Li-Ion batteries. That’s often the case when a new technology is developed. However, the cost between them is leveling out, so the price may or may not be your main consideration.

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An article in Simple Flying explained that drones “have become a valuable asset for police departments, allowing them to perform tasks at a lower cost.” The piece reports that police departments in the US, along with law enforcement organizations in the UK, Germany, and South Korea, are using drones equipped with cameras and sensor to perform a range of tasks, including surveillance and investigations, at “a fraction of the cost per flight hour” than conventional methods.

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Scott Howe is the Editorial Analyst for Commercial UAV News. He is a writer and editor with more than 35 years of experience working in fields such as higher education, healthcare, finance, and insurance. A native of Massachusetts, he currently lives in Portland, Maine.

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Look at the cabling of an NMC high charge rate battery compare it with an LFP cable set. The size difference is quite noticeable. And remember, the heavier hardware is NOT for using the battery, but for charging it. More heat from higher charging rates mean more potential for fire and other heat-related accidents during charging.