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The password manager giant said hackers were able to 'brute-force' its two-factor system, allowing them to access customer accounts and download their password vaults.

The global AI race is often framed as a battle between the United States and China. But at VivaTech, Europe is expected to make the case for an entirely different model.

The global AI race is often framed as a battle between the United States and China. But at VivaTech, Europe is expected to make the case for an entirely different model.

Every founder who applies to Startup Battlefield wants the same thing: the Disrupt Main Stage. Here’s how to get there and why the opportunity starts well before the main stage.

We wanted to show you what happens after the confetti falls. We checked in with some of our recent alumni, many of whom have sat down with us on Build Mode: The Founder Survival Guide, TechCrunch's podcast for founders at every stage.

Anyone who has downloaded affected Red Hat packages should investigate immediately.

Thanks to the newly detailed FROST technique, telltale SSD activity can be measured in the browser using simple JavaScript.

Plus: A ransomware group is now stealing data in person, BusPatrol wants to hand its license plate surveillance data to the cops, and more.

Lithium battery packs are only as strong as their weakest cell. Whether you're designing a drone battery, an EV pack, or an energy storage system, cell balancing plays a critical role in battery safety, lifespan, and performance. But many developers and hardware engineers still confuse passive balancing and active balancing , or underestimate how important balancing becomes in multi-cell lithium systems. In this article, we'll break down: Why battery balancing matters What causes cell imbalance How passive balancing works How active balancing works Engineering trade-offs between both methods Where each balancing strategy is commonly used 1. Why Battery Cells Become Unbalanced In theory, every lithium cell inside a battery pack should behave identically. In reality, that never happens. Even cells from the same production batch will have slight differences in: Internal resistance Capacity Self-discharge rate Temperature response Aging characteristics Over time, those small differences accumulate. For example: One cell may charge slightly faster Another may discharge deeper One may heat up more under load Eventually, the pack voltage becomes uneven. This is called cell imbalance . 2. Why Cell Imbalance Is Dangerous Imagine a 4S lithium battery pack. If one cell reaches 4.25V while the others are still at 4.10V, the charger must stop to avoid overcharging that single cell. That means: The entire pack never reaches full usable capacity Weak cells age faster Heat generation increases Safety risks become higher The same problem happens during discharge. If one cell drops below the minimum safe voltage earlier than others, the BMS cuts power to protect the pack — even though the remaining cells still contain energy. In other words: A battery pack is limited by its weakest cell. 3. What Is Battery Balancing? Battery balancing is the process of equalizing cell voltages inside a battery pack. The goal is simple: Prevent overcharge Prevent over-discharge Improve pack lifespan I

Startup Battlefield applications are due tomorrow, so now's the time to put the finishing touches on your submission!

If it scales up, it can help us diversify our sources of a key element.

Europe’s startup ecosystem has matured significantly; its founders are increasingly willing to scale companies domestically instead of immediately looking to relocate to the U.S.

After overwhelming demand from founders around the world, TechCrunch has extended the Startup Battlefield 200 application deadline to June 8. Nominate a standout startup or apply yours today.

Customer data from more than 350 hotels around the world may have been accessed as part of realistic reservation-hijacking scams.