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The battery and storage industry, read through primary sources. Every story is grounded in a primary document — an SEC filing or a patent record — never a press release. Disclosure or it didn't happen.

24Articles indexed
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SEC · IPFilings & patents

Latest Articles

24 articles indexed

Energy Storage

KULR Starts Cutting Bitcoin Exposure After Revenue Falls 43%

The battery-systems company reported negative 31% gross margin and a $22.0 million net loss, then said it exited mining and began reducing bitcoin holdings.

By Renata Cho · Aug 13, 2026 · SEC filing (8-K)

Energy Storage

Forty-Two Lithium-Ion Filings and One That Runs on Decay

A cell maker's August 6 publication set is dominated by pack safety, thermal management and electrode chemistry. A single record sits outside all of it — and it is claimed as a manufacturing method.

By Eli Fontaine · Aug 6, 2026 · Patent record

Energy Storage

Suppression priced per cell instead of per pack

Moving the extinguishing agent inside the cell wall multiplies its cost by the cell count. A published application does exactly that, and the filing discloses none of the numbers that would tell you whether it pencils.

By Jonah Okafor · Jul 23, 2026 · Patent record

Energy Storage

LG Energy Solution Files on a Coating That Shuts Current Off

A published application claims a two-ingredient electrode protective layer that stops conducting between 70 and 130 degrees C. It is the outlier in a same-day batch otherwise dominated by pack hardware.

By Eli Fontaine · Jul 21, 2026 · Patent record

Energy Storage

CATL Files a Process Answer to a Sodium-Cell Water Problem

A published application from Contemporary Amperex describes charging a sodium cell in a voltage window that electrolyzes leftover water into hydrogen before sodium can plate. The filing sits on the process line, not in the chemistry lab — and that is the part worth reading.

By Eli Fontaine · Jul 16, 2026 · Patent record

Energy Storage

Fluence's July Patent Drop Leans on Software, Not Cells

Five of nine newly published Fluence applications describe fleet diagnostics, state-of-health estimation, and maintenance optimization — the recurring, after-the-sale layer of the storage business.

By Eli Fontaine · Jul 2, 2026 · Patent record

Energy Storage

A Cylindrical-Cell Grant Wave Points to Where the Cell Line Is Heading

Nineteen battery grants issued to one cell maker on June 30 cluster around large-format cylindrical cells and the machinery to build and screen them — a signal about the commercial roadmap, read from the record.

By Jonah Okafor · Jun 30, 2026 · Patent record

Energy Storage

What Is the 'Use of Proceeds' Section in an S-1?

The use-of-proceeds disclosure tells investors what a company intends to do with the money it raises. Here is what SEC rules require it to state.

By Renata Cho · Jun 22, 2026 · SEC

Energy Storage

Tolling Agreement vs PPA for Energy Storage, Explained

A tolling agreement pays the owner for the right to dispatch a battery; a PPA buys the electricity produced. Here is how the two structures appear in real SEC filings.

By Jonah Okafor · Jun 22, 2026 · SEC

Energy Storage

What Is Tax-Equity Project Finance for Battery Storage?

Tax-equity financing lets a project monetize federal energy credits by bringing in an investor that can use them. Here is how the structure appears in a real SEC exhibit.

By Renata Cho · Jun 22, 2026 · SEC

Energy Storage

What Is a Going Concern Qualification in an SEC Filing?

A going-concern qualification is an auditor's flag that there is substantial doubt about a company's ability to keep operating. Here is what it means and how it reads in a real filing.

By Renata Cho · Jun 22, 2026 · SEC

Energy

NextNRG Swaps a $100,360 Insider Note for Stock — Read the 8-K

NextNRG (NXXT) filed an 8-K disclosing a Stock Purchase Agreement under which CEO and Executive Chairman Michael Farkas took 260,000 shares in exchange for cancelling a March 2024 promissory note, and the note was terminated the same day.

By Renata Cho · Jun 18, 2026 · SEC filing