How cobalt sourced from dangerous mines in DR Congo ends up inside Li-ion batteries powering gadgets made by Apple, Samsung, and other tech companies
Photos by Michael Robinson Chavez … The sun was rising over one of the richest mineral deposits on Earth, in one of the poorest countries, as Sidiki Mayamba got ready for work.
Context & Ripple Effects
This Washington Post investigation put a name and a face on the bottom of the battery supply chain: Sidiki Mayamba, digging cobalt by hand in DR Congo for batteries inside Apple and Samsung devices. It set the template for everything that followed — within months, Apple had temporarily stopped buying hand-mined Congolese cobalt after Sky News documented continuing child labor in the same pits.
First-order effects
- Apple and Samsung face immediate reputational and audit pressure over a raw material they had treated as an anonymous commodity, with artisanal miners like Mayamba caught between scrutiny and their only livelihood.
- Apple's response — suspending purchases of hand-dug cobalt rather than fixing conditions at the mines — shifts risk onto the informal mining economy without removing Congolese cobalt from its products.
Second-order effects
- Scarcity fears push Apple toward vertical control: by early 2018 it was reportedly in talks to buy long-term cobalt supplies directly from miners, trading middlemen opacity for first-party provenance.
- Rivals and battery suppliers must match that traceability or inherit the reputational premium, concentrating purchasing at large industrial mines and squeezing out artisanal cooperatives.
Third-order effects
- Supply-chain ethics are hardening into legal exposure: in late 2024 Congo filed criminal complaints against Apple subsidiaries in France and Belgium, turning sourcing allegations from PR problems into prosecutable claims.
- If the Belgian probe pattern holds, battery minerals become a due-diligence liability across the industry, favoring vertically integrated or contractually audited supply over spot-market artisanal material.
The trend: Tech supply chains are migrating from opaque artisanal mineral sourcing toward vertically controlled, legally defensible procurement as consumer investigations mature into criminal proceedings.