The Cobalt Rush: How Smartphones Created a Commodity Boom
The lithium-ion battery revolution transformed cobalt from an industrial byproduct into one of the world's most strategically significant minerals. The iPhone's launch in 2007, followed by the explosive growth of smartphones, tablets, laptops, and electric vehicles, created demand for lithium-ion batteries at a scale no one anticipated. Cobalt, essential for battery cathodes, saw prices surge from $25,000 per tonne in 2016 to over $80,000 in 2022.The DRC's dominance in cobalt production — over 70 percent of global output — meant that this price surge translated directly into economic activity across the Copperbelt. Industrial mines like Tenke Fungurume and Kamoto expanded production. Artisanal mining boomed as tens of thousands of new miners entered the sector, drawn by the prospect of earning more in a day digging cobalt than in a week at any available alternative. Kolwezi's population surged.
The cobalt rush also attracted intense international scrutiny. Amnesty International's 2016 report documenting child labour in artisanal cobalt mining created a media storm. Technology companies scrambled to demonstrate responsible sourcing. The regulatory response — EU CSDDD, strengthened OECD guidance — reshaped the compliance environment for mineral supply chains.
The subsequent price collapse from 2022 to 2025, driven by oversupply and battery chemistry evolution, has demonstrated the vulnerability of communities dependent on a single commodity. The Lobito Corridor's development coincides with this adjustment period, creating both challenges (reduced mining revenue) and opportunities (the corridor may help mines remain viable at lower prices by reducing transport costs).
The Commodity That Powered a Revolution
The story of how cobalt transformed from an obscure industrial metal into a globally strategic commodity begins with the lithium-ion battery revolution that powered smartphones, laptops, and eventually electric vehicles. Before 2010, cobalt was primarily used in superalloys for jet engines and industrial catalysts — important but niche applications. The explosive growth of portable electronics changed everything.
Apple's iPhone, launched in 2007, catalysed a smartphone revolution that by 2024 had placed approximately 6.5 billion smartphones in active use worldwide. Each smartphone contains approximately 8 grams of cobalt in its lithium-ion battery. That seemingly tiny amount, multiplied by billions of devices, created enormous new demand for a commodity whose supply was concentrated in one country: the Democratic Republic of Congo.
The DRC produces approximately 76% of the world's cobalt, a concentration of supply unmatched by any other critical mineral except perhaps rare earths. This geological accident of cobalt-rich copper deposits in the Katanga region (now Haut-Katanga and Lualaba provinces) made the DRC central to the global technology supply chain in ways that few predicted and fewer planned for.
The Price Surge
Cobalt prices, which had fluctuated between $20,000 and $30,000 per tonne for much of the 2000s, began climbing as smartphone production scaled. By 2018, cobalt reached over $95,000 per tonne — a surge that transformed the economics of DRC mining and attracted waves of speculative investment. Every mining company with DRC assets suddenly held vastly more valuable properties. Glencore's Mutanda and Kamoto operations became among the most profitable mines in the world.
The price surge also transformed artisanal mining. With cobalt prices at historic highs, hundreds of thousands of Congolese citizens — including children — entered artisanal cobalt mining. Armed with shovels and bare hands, artisanal miners dug into cobalt-rich earth, often in extremely dangerous conditions. The human cost of the cobalt boom became a global story when investigations by Amnesty International and others documented child labour, unsafe conditions, and exploitative supply chains linking DRC artisanal cobalt to consumer electronics brands.
The Supply Chain Scandal
The revelation that cobalt in smartphones and laptops was mined by children in the DRC created a public relations crisis for technology companies. Apple, Samsung, Dell, and other major brands faced pressure to demonstrate that their supply chains were free of child-mined cobalt. The resulting due diligence programmes, supply chain audits, and industry initiatives — including the Responsible Cobalt Initiative and the Fair Cobalt Alliance — represented attempts to address the problem without abandoning DRC cobalt sourcing.
The supply chain challenge was genuinely complex. Artisanal cobalt entered the formal supply chain through multiple intermediary steps that obscured its origins. A cobalt trader in Kolwezi might purchase from dozens of artisanal miners, aggregate the material, and sell to a processing company. By the time the cobalt reached a battery manufacturer in China, its specific origin — and whether children had mined it — was impossible to determine.
This traceability challenge is precisely what the Lobito Corridor's source verification infrastructure is designed to address. By creating verifiable chain of custody from mine to port, with forensic proof at each transfer point, the corridor can provide the supply chain transparency that the cobalt industry has struggled to achieve through traditional means.
The Price Collapse
What went up came crashing down. Cobalt prices collapsed from over $90,000 per tonne in 2018 to below $30,000 by late 2023, eventually falling to approximately $24,000 by 2025. The collapse was driven by multiple factors: massive supply expansion from DRC mines (particularly Kamoa-Kakula's copper-cobalt production), battery chemistry shifts reducing cobalt content per battery, and slower-than-expected electric vehicle adoption in some markets.
The price collapse devastated artisanal mining communities. Families that had come to depend on cobalt income found their earnings cut by 70% or more. Some returned to subsistence agriculture; others continued mining at lower productivity levels; some were pushed into even more dangerous mining practices, digging deeper into unstable ground to reach richer ore. The human cost of the price collapse mirrored the human cost of the boom — vulnerable communities bearing disproportionate risk in a global commodity cycle they did not create and could not control.
The Entreprise Générale du Cobalt (EGC), created by the DRC government to formalise and monopolise artisanal cobalt purchasing, represents one attempt to protect artisanal miners from price volatility by providing guaranteed minimum pricing. The EGC's first artisanal cobalt shipment through the corridor in early 2026 tests whether this model can provide genuine protection for mining communities.
Battery Chemistry Evolution
The cobalt rush catalysed a technological response: battery manufacturers invested heavily in reducing cobalt content per battery. Tesla's shift toward lithium iron phosphate (LFP) batteries, which contain no cobalt, was the most visible example. CATL's sodium-ion batteries, BYD's Blade Battery technology, and ongoing research into solid-state batteries all aimed to reduce or eliminate cobalt dependence.
These chemistry shifts complicate the DRC's cobalt economic outlook. While total battery production is growing rapidly, cobalt content per battery is declining. The net effect on cobalt demand depends on the race between these two trends — a race that analysts project will sustain moderate cobalt demand growth through the 2030s but at much lower levels than the most optimistic projections of the boom era.
Lessons for the Corridor
The cobalt rush and its aftermath contain critical lessons for corridor development. First, commodity dependence creates vulnerability — communities and countries that build economic strategies around a single commodity face devastating consequences when prices shift. Second, supply chain accountability requires infrastructure — voluntary commitments by technology companies proved insufficient without physical traceability systems. Third, formalisation of artisanal mining requires sustained investment, not just policy announcements — the gap between DRC artisanal mining regulations and reality remains enormous.
The corridor's value proposition includes addressing each of these lessons: diversifying the commodity base (copper alongside cobalt), providing physical traceability infrastructure, and supporting artisanal mining formalisation through the EGC and related programmes. Whether this value proposition translates into genuine community benefit is the central question our monitoring addresses.
Legacy for the Modern Corridor
The historical patterns documented in this account of cobalt rush smartphones continue to shape corridor development in ways that contemporary analysis frequently underestimates. Decision-makers — investors, government officials, international organisations — approach the corridor as a forward-looking infrastructure project. Communities along the corridor approach it as the latest chapter in a long history of external actors extracting value from their region. This divergence in perspective explains many of the tensions that our monitoring documents.
The institutional legacies of cobalt rush smartphones persist in governance structures, land tenure arrangements, community expectations, and political dynamics that corridor investors encounter. Colonial-era concession frameworks shaped post-independence mining codes. War-era displacement patterns created community configurations that current development plans must navigate. Privatisation-era experiences shaped community attitudes toward foreign investment. These historical layers cannot be wished away by development rhetoric; they must be understood, acknowledged, and addressed.
For our monitoring and advocacy work, this history provides essential context for assessing current practices. When we evaluate displacement procedures, we assess them against historical patterns of displacement that communities remember. When we evaluate benefit-sharing proposals, we compare them to historical patterns of benefit extraction that communities have experienced. When we evaluate community consultation processes, we measure them against historical patterns of exclusion that communities have endured. History is not background; it is the lens through which communities evaluate the corridor's promises.
The corridor has the potential to break historical patterns of extraction without community benefit. But realising this potential requires conscious effort to design governance frameworks, community engagement processes, and benefit-sharing mechanisms that explicitly address historical grievances. Our role is to ensure that this historical consciousness informs corridor development — that the mistakes documented in these historical accounts are not repeated in the next chapter of the corridor's story.
The Artisanal Mining Economy
At the height of the cobalt boom, an estimated 200,000-300,000 artisanal miners worked in the DRC's cobalt sector. These miners — men, women, and children — used hand tools to extract cobalt-rich ore from shallow deposits, often in extremely dangerous conditions. Tunnel collapses killed dozens annually. Exposure to toxic dust caused respiratory disease. Lack of protective equipment, clean water, and medical facilities created health crises in mining communities.
The artisanal mining economy generated an estimated $1-2 billion annually in cobalt value, supporting millions of dependents in mining communities. For families in Kolwezi and surrounding areas, artisanal mining was not a choice but a survival strategy in a region where formal employment opportunities were scarce and agricultural productivity was limited. Attempts to eliminate artisanal mining without providing alternative livelihoods would condemn these families to destitution.
The corridor's approach to artisanal mining — through the EGC formalisation model and improved transport economics — offers potential improvement if implemented with genuine community benefit. Our monitoring tracks whether formalisation actually improves conditions and incomes for artisanal miners, or merely displaces them to benefit industrial operators.
Related Intelligence
This historical analysis draws on published academic sources.