Input is what the charger accepts from the wall; output is what it delivers to the tool — and only the output has to match the figure printed on the machine.
The BENSN replacement charger on this site states input 100–240 V, 50–60 Hz and output 12 V, 0.4 A. The MEROM states input 100–240 V and output 5.9 V, 600 mA.
Reading them: both accept the line voltage of most countries, which is what makes them usable abroad with a plug adapter. They deliver different things to different tools.
The output voltage must match. The current rating should meet or exceed what the tool asks for; a supply rated higher does not force more current into the device.
The figure on the tool is the reference. Anything else — the brand, the connector shape, the price — is secondary to it.
Check your own manual before you follow anything here. Temperatures, water ratings and supply voltages differ from model to model, and the maker’s own figures take precedence over anything written on this site. A supply of the wrong voltage is a failure rather than a slow charge, and the figure is printed on the tool — not inferred from a connector that happens to fit.
Last reviewed August 22, 2026