EU Consumer Report Reveals 40% of Power Banks Fail to Meet Claimed Capacity

A new EU consumer report shows that nearly four out of ten power banks sold in the region do not deliver the capacity printed on their labels, raising questions about quality, safety, and transparency in the mobile power market.

The European Consumer Electronics Safety Commission (ECESC) has released the results of a large-scale test on power banks sold across the European Union. Between July and October 2025, the agency tested more than 120 models ranging from 5000mAh to 30000mAh. The findings show that a significant share of products fail to reach their advertised capacity, especially in the low-cost and unbranded segment.

Key findings from the EU power bank capacity tests

According to the report, around 40 percent of tested power banks did not meet their claimed mAh capacity. Many units delivered between 55 percent and 80 percent of the advertised value, and a small group fell below 50 percent of the stated number. The problem was especially visible among low-price models sold through online marketplaces and grey channels.

Capacity gaps hint at deeper quality and safety issues

ECESC experts warn that underperforming capacity values are not just a marketing problem. In many cases, failing to meet claimed mAh figures is a sign of low quality lithium cells and inefficient internal circuitry. These weaknesses can lead to higher heat output, faster aging, and a higher risk of failure over time.

The report notes that some of the poorest performing power banks showed inconsistent output voltage and visible heating during sustained fast charging. These patterns may shorten the lifespan of both the power bank and the smartphone battery connected to it, especially when using high power USB-C PD charging.

EU regulators call for stricter labeling and testing

In response to the findings, the ECESC is urging manufacturers and importers to back up their labels with transparent test data. Future guidelines are expected to require clearer documentation for capacity claims and may introduce routine spot checks across online and offline channels starting from early 2026.

Regulators are also considering alignment with broader EU battery regulations, including clearer rules on how power bank capacity is measured, what test conditions are allowed, and how results must be communicated to consumers on packaging and product pages.

What the report means for consumers and power bank brands

For consumers, the report is a reminder that not every 10000mAh or 20000mAh power bank delivers the same real-world energy. Buying from reputable brands, checking reviews, and avoiding suspiciously cheap offers are now more important than ever. A power bank with genuine capacity not only lasts longer, but also runs cooler and treats smartphone batteries more gently.

For manufacturers and OEM suppliers, the findings highlight the long-term value of honest labeling and consistent performance. Power banks that deliver verified capacity, stable USB-C PD fast charging, and low heat are likely to see stronger customer trust, lower return rates, and better positioning in a more tightly regulated EU market.

Outlook: transparency and verified capacity as key differentiators

As demand for high capacity power banks continues to grow, the European market is expected to move toward stricter verification of mAh claims and stronger enforcement against misleading labels. Brands that offer verifiable capacity, robust lithium battery design, and clear documentation will be better positioned when new rules come into effect.

The ECESC report suggests that accurate capacity claims are becoming not only a legal requirement but also a competitive advantage for manufacturers that target informed consumers and long-term business partners.