Regulation (EU) 2023/1542 does not regulate "a battery" generically: Article 3 defines five categories — portable, LMT, SLI, electric-vehicle and industrial — and almost every downstream obligation, deadline and exemption is keyed to that classification. For a nickel-metal hydride (NiMH) manufacturer selling AA cells, button cells, medical battery packs and large backup strings, the same electrochemistry can land in two different categories depending on weight, design intent and use. This paper explains the decision tree and its consequences.
A portable battery is sealed, weighs 5 kg or less, and is neither designed specifically for industrial or EV use nor an SLI or LMT battery — the category deliberately catches general-purpose cells and packs. An LMT battery powers light means of transport such as e-bikes and e-scooters. An SLI battery supplies starting, lighting or ignition energy for vehicles. An electric-vehicle battery is defined in line with Regulation 2007/46/EC to propel hybrid and electric vehicles. An industrial battery is designed exclusively for industrial or professional uses, used as backup or emergency power, or weighs above 5 kg and is neither LMT, EV nor SLI. The definition is deliberately residual: if a battery is not portable, LMT, SLI or EV, it is industrial.
Standard NiMH AA/AAA/C/D and 9 V cells, button cells and sealed packs up to 5 kg for consumer electronics, medical devices, instruments and backup memory are portable batteries. NiMH modules for e-bikes are LMT batteries. Large NiMH strings for stationary backup, railway, UPS, solar storage and professional equipment that exceed 5 kg are industrial batteries, as are packs designed exclusively for professional use even below 5 kg. The classification follows design intent and labeling as much as mass: a 4.8 V instrument pack remains portable, while a heavy emergency-lighting bank is industrial regardless of cell chemistry.
Substance limits (Article 6, Annex I), CE conformity (Articles 15–20), labeling (Article 13) and due diligence (Articles 47–53) apply to every category. Beyond that common floor the regimes differ: Annex III governs portable performance and durability while Annex IV governs industrial, LMT and EV parameters; carbon-footprint declarations (Article 7) and recycled-content declarations (Article 8) never apply to portable batteries but do apply to large industrial batteries above 2 kWh; the digital battery passport (Articles 77–78) is required for LMT, EV and industrial batteries above 2 kWh but not for portable cells; safety testing under Article 12 and Annex V targets stationary storage systems. The layered diagram below shows how a single product dossier is assembled according to the class assigned.
Two numeric gates matter most for NiMH exporters. The 5 kg gate separates sealed portable cells from the residual industrial category; the 2 kWh gate decides whether an industrial battery is drawn into the carbon-footprint, recycled-content and battery-passport regimes. At a nominal 1.2 V per NiMH cell, 2 kWh corresponds to roughly 1,667 Ah at pack level, so the great majority of NiMH industrial packs sit below the threshold and avoid passport and carbon duties entirely — but they remain fully bound by substance, conformity, labeling, durability and due-diligence rules. Documenting the arithmetic in the technical file is what proves the exemption rather than merely asserting it.
Under-classifying an industrial pack as portable can omit Annex IV parameters and safety evidence; over-classifying a portable pack as industrial can wrongly imply passport obligations while missing portable-specific label deadlines. Market-surveillance authorities and online marketplaces classify on the evidence in the technical file and label, not on the seller's description. Best practice is a written classification rationale per product family: weight, voltage, capacity in Wh, intended use, end-user type and the article chain that leads to the category, signed and kept in the Annex VIII documentation for ten years.
Weijiang Power supplies both portable NiMH cells (AA/AAA/C/D/9 V, button and sealed custom packs up to 5 kg) and professional NiMH industrial packs, each shipped with a written EU category classification and the matching obligation dossier. Tell us your device, pack mass, Wh and intended user and we deliver the correct Annex III or Annex IV evidence, Article 13 labels and Declaration of Conformity — so your importer never has to argue category at customs.
