Here's a simple equation for you: the world wants electric cars and big batteries to store renewable energy. Those things need lithium. The world might not have enough lithium. That's the basic math from a new report that should have battery makers, car companies, and investors paying close attention.

Consultancy Wood Mackenzie has run the numbers, and they're pretty stark. Global lithium demand could rocket past 13 million tons by 2050 if we get serious about hitting net-zero emissions. That's more than twice what they project under a more conservative, business-as-usual path. The kicker? Even if we stick to current trends, supply starts struggling to keep up by the mid-2030s. Without a flood of new money into mines and processing plants, we could be staring down the barrel of a lithium shortage as soon as 2028.

Think of it like trying to fill a swimming pool with a garden hose while someone keeps opening the drain. The demand just keeps flowing.

Four Futures, One Problem: Not Enough Lithium

The report lays out four different paths for the energy transition, and lithium supply is a headache in almost all of them. It's a choose-your-own-adventure book where most endings involve a deficit.

In the most ambitious "net-zero" scenario—where the world rapidly decarbonizes—we'd need an extra 8.5 million tons of lithium supply by 2050. Deficits start popping up in 2028 and just don't quit. Even under the "country-pledges" scenario, where governments actually follow through on their Paris Agreement promises, we'd need 6.7 million more tons, with shortages likely beginning around 2029.

The "base case," which is basically what happens if we keep on our current trajectory, sees the market getting tight in the 2030s. The only scenario that gives us a bit of breathing room is the "delayed transition," where clean tech adoption is slow and climate policy is weak. In that world, we might be okay for another decade before tipping into deficit in 2037. So, the choice seems to be: push hard on the energy transition and face a lithium crunch sooner, or go slow and face it a little later. Either way, it's coming.

"This is a $100–$275 billion investment story depending on how the energy transition unfolds," said Wood Mackenzie senior research analyst Rebecca Grant. She added a crucial caveat: that capital needs to be deployed efficiently, which is no small feat in a world of trade fragmentation and shifting supply chains.

EVs Are the Engine, But Don't Forget the Battery in the Basement

So who's drinking all this lithium? You guessed it: electric vehicles. They're expected to account for a whopping 72% to 80% of total lithium consumption across all scenarios. Every new EV that rolls off the line is another sip from the global lithium cup.

But Grant points out another, quieter driver. "EVs remain the primary driver of lithium demand growth, but energy storage systems are the sleeper story," she said. Those big battery packs that store solar power for when the sun isn't shining, or wind power for a calm day? They need lithium too. As grids get greener, they'll need more batteries, and that's a whole new source of demand that's just waking up.

The reason lithium is so hard to replace is simple physics. It's the lightest metal, it packs a lot of energy into a small space, and it lets batteries be recharged over and over. For now, there's no real substitute if you want a lightweight, long-range EV or a durable grid battery.

The Price Tag and Who's Getting Ready

Fixing this isn't going to be cheap. Wood Mackenzie puts a price on each future:

• $104 billion under a delayed, slow transition.
• $114 billion in the base case.
• $236 billion if countries meet their pledges.
• A whopping $276 billion in a net-zero world.

That's the cost of building the mines, refineries, and infrastructure to get the lithium out of the ground and into batteries. It's a staggering amount of capital that needs to find its way into the ground.

Some players are already positioning for this tighter future. Top producer SQM (SQM), the Chilean mining giant, expects global lithium demand to grow about 25% just this year. The company sees the current market oversupply fading and a "significantly stronger price environment" on the horizon. Through a joint venture with Codelco at the massive Atacama salt flat, SQM is aiming to boost its production by roughly 30% in the coming years.

For investors watching the space, the Global X Lithium & Battery Tech ETF (LIT) is one barometer, up about 6% year-to-date. The message from the report is clear: whether you're a carmaker, a utility, or an investor, the lithium supply chain is about to become the most important story in the energy transition. And it needs a lot more money, fast.