Samsung SDI is taking full control of its Indiana battery plant. The South Korean cell maker is buying out General Motors’ 49.99% stake in their joint venture, according to a regulatory filing, ending GM’s ownership in the $3.5 billion factory.

That turns the New Carlisle, Indiana plant into Samsung SDI’s first wholly owned battery factory in North America.

CATL has signed a memorandum of understanding with Dutch energy company Alfen to deploy 5 GWh of its Tener Sodium energy storage systems across Europe, one of the largest sodium-ion commitments the region has seen.

The batteries are rated for 15,000 cycles and a 25-to-30-year service life — the pitch that sodium-ion’s longevity, not its energy density, is what wins grid storage.

Made from more affordable and more abundant materials than li-ion, sodium batteries promise more abundant and more affordable electric vehicles – but will sodium batteries be practical for commercial trucks? Chinese truck brand FAW Jiefang is working to find out.

General Motors has expanded its partnership with Redwood Materials to cover every stage of the battery lifecycle — manufacturing scrap recovery, end-of-life recycling, and now second-life energy storage deployed at a GM factory. It’s the first automaker to hit all three with JB Straubel’s company.

The latest piece is a 1.5 MW / 7.2 MWh energy storage system built from roughly 100 repurposed GM battery packs, set to be installed at a GM manufacturing plant in Michigan. Redwood says the system will save the plant more than $3 million in electricity costs over its lifetime.