I wanted a car battery charger(to replace jump starting with another car) and have been looking at some online but dont really know how they works, about charging times etc e.g. https://www.argos.co.uk/product/7404355
It's not clear to me what the cons of these products are.
It says 'Mains operated (240v - 64W) it can take up to 16 hours to fully charge your vehicle's battery.'.
Does this mean it needs to be plugged into a main switch for up to 16 hours while attempting to charge the battery or does it mean you mains charge it, take it out then leave it connected to car battery for up to 16 hours?
I was under the impression you just connect it then crank the engine and car should start up straight after which you can disconnect the charger and ensure you shouldn't stall for 30 minutes to let battery charge up?
Is this how it works or do I need to leave it connected for hours etc?
Can you disconnect the battery, take it home and charge it up there or does it need to be connected to alternator etc?