Bringing a professional two-way radio to market means satisfying radio-spectrum rules, electromagnetic compatibility, ruggedness and - for hazardous industries - intrinsic safety, while the battery that powers it carries its own performance, safety and transport evidence. This final paper maps the complete compliance campaign for a nickel-metal hydride powered industrial radio: the ETSI harmonised standards EN 300 086, EN 300 296 and EN 300 113 that sit under the Radio Equipment Directive 2014/53/EU, the ingress and military-style ruggedness ratings (IP67/IP68 and MIL-STD-810 methods) that define a worksite radio, the ATEX/IECEx intrinsic-safety regime in which the NiMH pack is a certified, named component, and the IEC 61951-2, IEC 62133-2 and UN 38.3 documents for the cells. It shows how transmit performance at minimum battery state and low temperature is woven into type testing, and why a battery partner that supplies complete, lot-traceable NiMH documentation - and understands Ex certification - materially shortens the radio maker's route to market.
In Europe, land-mobile radios are placed on the market under the Radio Equipment Directive 2014/53/EU, using harmonised ETSI standards to demonstrate effective use of spectrum and receiver performance. EN 300 086 covers analogue land-mobile radio characteristics, EN 300 296 covers civil mobile radio with an internal or external RF connector, and EN 300 113 addresses land-mobile radio in the VHF/UHF range; the EMC requirements are addressed through the corresponding EN 301 489 family, and safety through the low-voltage-aligned electrical-safety standards.
Radio conformance includes transmitter output power, adjacent-channel power, modulation and receiver blocking - and these tests are run across the battery voltage range, because the RF power amplifier's performance depends on its supply. A NiMH pack must deliver rated transmit power and spectral purity on a fresh pack, at end of discharge and (for outdoor radios) at low temperature; a pack that sags into a transmit pulse can push output power or spectral masks out of limit, which is why the low-impedance design of the previous paper is also a radio-conformance requirement.
A worksite radio must neither be disturbed by industrial electromagnetic noise nor disturb other equipment. EMC testing covers radiated and conducted emissions from the radio and immunity to electrostatic discharge, radiated fields and electrical transients encountered around motors, welders and switchgear. The battery and its charging cradle are part of this picture: conducted noise from the charger must not degrade the radio, and a pack's internal impedance must not make the radio susceptible to reset during an immunity burst.
Tests are performed in the radio's real configurations - handheld, in the charger, with accessories - and across battery states. Demonstrating clean operation with the production NiMH pack during ESD and transient immunity closes a gap that has caused real field failures where a marginal battery browned out under a discharge event.
Industrial radios are specified to survive water and dust to IP67 or IP68 under IEC 60529 - often including mandated minutes of immersion - and to a programme of environmental methods drawn from MIL-STD-810: blow, rain, dust, vibration, shock, solar radiation and high/low temperature, plus repeated drop tests onto concrete. These are marketing claims only when backed by method-by-method reports, and they are always performed with the production battery fitted.
For the NiMH pack this means surviving drops and immersion without venting, leakage or contact failure, and delivering rated performance after thermal and vibration cycling. The pack gasket and housing validated in the design paper are what preserve the radio's IP rating when a replacement NiMH pack is fitted - an important point, because a poorly made aftermarket battery can silently downgrade a certified radio's ingress protection.
For radios used in explosive atmospheres, the ATEX directive in Europe and the parallel IECEx scheme require intrinsic safety under the IEC 60079 series (including the equipment protection levels and constructional standards for portable radios). In an intrinsically safe radio, every energy-storing element - including the battery - is controlled so no normal or single-fault condition can ignite the surrounding atmosphere; the certified battery type is named in the certificate and cannot be substituted without assessment.
The NiMH pack's contribution is documented evidence of maximum short-circuit current, cell and pack surface temperatures under fault, internal fusing or current-limiting construction, and mechanical protection against cell damage. Because NiMH chemistry is comparatively stable and its fault behaviour well understood, it has a long history in Ex radios; a manufacturer able to supply this evidence with lot-consistent cells protects the radio maker from re-certification whenever production varies, which is among the most valuable things a battery partner can offer an Ex programme.
The cells carry standardised evidence. IEC 61951-2 specifies performance tests for sealed nickel-metal hydride cells and batteries - capacity, charge retention (supporting low-self-discharge claims), endurance and internal resistance - extended here with high-rate pulse discharge and wide-temperature data matching the 5-5-90 profile. IEC 62133-2 specifies safety under controlled charge, forced discharge, external short circuit, vibration, shock, free fall, thermal abuse, crush and pack-level protection faults, demonstrating the pack stays safe through the abuses a worksite delivers.
UN 38.3 provides the transport test summary required to ship cells and packs by air, sea and road; NiMH's non-lithium classification eases worldwide distribution of replacement packs to industrial customers and service centres relative to lithium batteries. The three documents, with lot traceability, form the battery section of the radio's technical file and support both conformity assessment and after-sales spares.
The complete file integrates the RED/ETSI radio and EMC certificates taken across battery state and temperature, the IEC 60529 and MIL-STD-810 ruggedness reports run with the production NiMH pack, the ATEX/IECEx intrinsic-safety certificate naming the approved battery where required, and the IEC 61951-2, IEC 62133-2 and UN 38.3 battery dossier. The connecting principle is that the battery is tested as part of the radio's RF, EMC, environmental and safety functions rather than as an isolated consumable.
A battery manufacturer supplying matched high-rate NiMH cells and finished drop-in packs with the full evidence set - and the engineering data needed for intrinsic-safety certification - removes one of the most variable components from that file. With that backbone, the radio OEM can field a worksite-tough, spectrum-compliant, optionally Ex-rated handheld whose NiMH packs deliver twelve to twenty-four hours of dependable dispatch duty, charge safely across a multi-shift fleet, and remain available as certified spares for the long service life of an industrial radio fleet.
Weijiang Power designs and manufactures sealed nickel-metal hydride cells and matched industrial packs for remote, off-grid and safety-related equipment, and supports OEM partners with IEC 61951-2 performance files, IEC 62133-2 safety evidence, pulse-load characterisation, wide-temperature testing and charger/pack co-validation. Tell us your duty cycle, peak current, temperature envelope, autonomy target and the standards your product must meet, and our engineers will specify a cell-and-pack combination that protects runtime, reliability and service life. Review the range on the products page.
