BAK Battery Unveils Four High-Safety Cells to Meet Upcoming Mobile Power Regulations

As China’s mobile power industry braces for a sweeping safety overhaul, BAK Battery has become the first battery manufacturer to introduce a series of cells specifically engineered to comply with the forthcoming national standards. The company unveiled four new models — 126280 (10000mAh), 1260110 (10000mAh), 606072 (5000mAh) and 526578 (5000mAh) — all of which pass the most stringent 4mm nail penetration test and are designed to support next-generation power banks with enhanced safety and traceability.

The moves comes against the backdrop of what is widely regarded as the strictest safety specification for power banks in China. In November 2025, the Ministry of Industry and Information Technology (MIIT) released a draft for comment of the Technical Specification for Safety of Mobile Power, with the final version expected in the first quarter of 2026. Additionally, from March 1, 2026, all newly China Compulsory Certification (CCC) certified products must bear an updated logo that integrates a traceability QR code. By March 1, 2027, every product on the market will have to comply with the updated marking requirements.

End-to-end safety and traceability take centre stage

The forthcoming regulation places unprecedented emphasis on full-chain battery safety. It introduces or tightens requirements for cathode/anode materials, production process control, and even safety tests after cycle aging. Smart management functions — such as voltage and temperature monitoring — will be mandatory, while the labelling of cell chemistry and safe service life also becomes compulsory. The revised CCC mark, coupled with the QR code, aims to drive the entire industry toward greater transparency and standardisation.

BAK Battery has proactively aligned its product roadmap with these rules, turning regulatory demands into technological differentiation.

Material and structural innovations deliver verified safety

To address the upgraded safety challenges, BAK has implemented a multi-layered approach. At the material level, the company employs a polymer electrolyte with a higher thermal decomposition temperature, significantly reducing the risk of thermal runaway. A safety coating on the separator improves nail penetration performance — all four cells survive a 4mm steel nail puncture without fire or explosion. The cathodes and electrolyte have been optimised, while the separator’s thermal shrinkage is minimised. The cells withstand 1.3 times the rated voltage without ignition and pass hot box tests, ensuring end-to-end reliability from material to finished product.

Structurally, BAK uses an aluminium-plastic composite film packaging that enhances mechanical stability. A centre-tab design improves rate capability and reduces temperature rise during high-current discharge. On the anode side, novel silicon‑carbon materials are introduced to boost energy density without increasing volume, enabling slimmer power bank designs.

Four cells tailored for diverse power bank types

Each of the four newly launched cells carries distinct performance highlights while sharing a common foundation of extreme safety:

• 126280-10000mAh – Utilises high‑voltage NMC materials, achieving an energy density of 640 Wh/L. It balances high capacity with lightweight construction, ideal for premium portable power.
• 1260110-10000mAh – Adopts an “NMC + manganese” blend, offering superior temperature adaptability. It supports 1C discharge across a wide range from -20°C to 60°C.
• 606072-5000mAh & 526578-5000mAh – Deliver an impressive energy density of up to 730 Wh/L in a compact footprint. Both support up to 1.5C discharge, catering to users who demand fast recharging.

All four models pass the 4mm nail penetration test required by the new standard, a benchmark that confirms “genuine safety” under extreme conditions.

Semi-solid state progress and future outlook

Beyond immediate compliance, BAK Battery is also making headway in next‑generation technologies. The company is developing a 506578 5Ah semi-solid state cell, which is expected to offer high safety without compromising performance. It meets the upcoming national standards, passing the 4mm nail, 135°C hot box, and 1.3× overcharge tests. Samples are scheduled to be available by March 2026.

By integrating these advances, BAK Battery is not only providing instant compliance solutions but also leading the co‑evolution of safety and performance. The company states that it will continue to innovate and collaborate with industry partners to drive mobile power towards a safer and smarter future.