Low-drain devices are where pre-charged LSD NiMH competes with alkaline on its own quiet ground: self-discharge versus shelf life, measured across the always-on background load of a modern home.
A test-methodology paper: how to measure NiMH versus alkaline performance under realistic pulsed household loads, interpret recovered voltage and internal resistance, and build a defensible high-drain claim.
A device-by-device selection paper: translating the current profile of cameras, flash, motorised toys, game controllers, toothbrushes and shavers into NiMH capacity, resistance and pack choices.
The electrochemistry behind a counter-intuitive result: a 1.2 V rechargeable often outlasts a 1.5 V alkaline in a camera, flash or motorised toy, because of flat discharge voltage and far lower internal resistance under load.
A test-and-certification paper for consumer NiMH charger systems: the EN 60335-2-29 household-charger safety standard, termination and abnormal-charge tests, and joint cell-charger validation that prevents field failures.
A charger design-and-selection paper: choosing charge current against cell size and heat, the case for USB-C power delivery, bay architecture, indicators, refresh modes and the cost/quality ladder for retail.
The charge-termination science behind a good AA/AAA charger: why NiMH cannot be charged to a fixed voltage, how negative-delta-V and temperature-rise detection work, and why every smart channel needs a timer backstop.
A test-and-certification paper: how charge retention, charge recovery and endurance in cycles are actually measured under IEC 61951-2, and how to substantiate a long-storage claim honestly.
