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October 2026

What Changed Inside Haribo's Power Bank

In this Article:

  • CT scans revealed hidden battery defects in Haribo’s popular 20,000 mAh power bank that conventional safety and certification testing had missed.
  • The manufacturer overhauled its battery production and quality processes, improving electrode alignment, upgrading the battery pack, and rebuilding its internal quality department.
  • X-ray CT is now part of ongoing quality control, with DC Hong Kong Global incorporating scans into batch validation before shipment.
  • 10.21.2026

    Last year we CT scanned the Haribo 20,000 mAh power bank, which impressed ultralight backpackers and tech enthusiasts with how much capacity it packed into just 286 grams. What we found inside was concerning: battery defects that raised the likelihood of failure. Amazon removed the listing, telling customers it had learned of a “potential safety or quality issue,” leading DC Hong Kong Global (DCHK) to undertake a comprehensive quality review.

    The episode was a crisis for DCHK, which makes Haribo-branded electronics under license from the gummy bear company. The Haribo power bank was the company’s biggest seller, and a battery quality issue had pushed it out of the market.

    A new version of the power bank is now on its way. DCHK used Lumafield’s X-ray CT technology to track down the issue, rebuilt its internal quality department, and upgraded the pack. Now DCHK has built X-ray CT into its ongoing quality process.

    We spoke with the quality managers at DCHK to learn more about how they approached reviewing their design and how CT changed their validation process.

    What we found last year

    The original Haribo power bank had two pouch cells with poor edge alignment. Instead of forming a uniform edge, the electrode layers rose and fell in a wavy pattern which shows the cell maker hadn’t stabilized the electrodes before sealing. Battery manufacturers keep electrode alignment under tight control since misalignment can lead to uneven lithium plating and dendrite formation. Over time, that can wear down a battery’s longevity and in some cases end in thermal runaway.

    ‍

    The two pouch cells in the original power bank. The electrode edges rise and fall in a wavy line with some falling below the 0.5 mm industry standard.

    What DC Hong Kong Global changed

    When DC Hong Kong Global investigated its batteries, the company pulled back much of its existing inventory for a full review. That review led DCHK to implement improvements to battery manufacturing and quality control processes, resulting in more consistent electrode alignment and improved internal battery structure. As part of its corrective actions, the company says, it rebuilt its internal quality department, reworked its battery manufacturing process, upgraded the battery pack, and produced a completely new batch.

    “It was a big decision, but we want to address the issue at the source rather than simply replace the [existing products] that are defective,” said Charles Cai, Head of Marketing Communications at DCHK.

    A third-party lab runs the same tests on the original cells and the new ones. Tests cover electrical performance, including cycle life, and how the battery management system protects against overcurrent and overvoltage. Environmental tests expose the batteries to high and low temperatures and high humidity, and physical tests drop them, put them under pressure, and short-circuit them. Before our scans, the original battery had passed UN 38.3, the testing required to ship lithium batteries, and the power bank had gone through testing under UL 2056, the safety standard for power banks. Neither flagged the defect that our X-ray CT scans found.

    The company says the scans revealed internal cell structure that functional and safety testing doesn’t show, including where the problem was. “Passing the standard test is one thing,” Cai said. “CT scans can give us another level of visibility.”

    DC Hong Kong Global now builds CT scanning into its validation process. Going forward, the company says it will CT scan batches before they ship out.

    Inside the new packs

    Among its process changes, DC Hong Kong Global refined its electrode assembly. The company says it slowed the relevant manufacturing steps to control electrode alignment more carefully and produce a more orderly, consistent internal structure. “This reduces production throughput, but we believe the improvement in manufacturing quality is worth the trade-off,” Peeljoon Chang, CEO of DCHK said.

    One of the new battery packs. The electrode edge alignment along the top runs smoother across both cells and anode overhang doesn’t fall below the 0.5mm industry standard.

    Rethinking quality through CT scans

    The functional tests that DCHK had relied on originally missed a critical quality gap that CT scans were able to identify: electrode layers misaligned inside the cells that had already cleared certification. By the company’s account, CT scans changed its entire process and philosophy. Passing the standard tests used to be the finish line, but now DCHK requires CT to be part of its validation process. The improved Haribo power banks start shipping this fall.

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