I know you have settled on the Maypole and I'm sure that will be fine for your friend as others seem quite happy with the make, but for what it's worth I will share my two penn'orth, as it might be interesting and/or helpful to others reading your thread.
Always down to personal preference and experience when it comes to things like this Chris,, or in my case with the battery charger having never bought one before a bit of research lead me to my choice of CTEK and I have had the same MXS 7.0 model for years on each of my cars, with no hint of trouble at all.
I did my homework looking at reviews and of course for me the obligatory YT videos on the net and settled for the CTEK as they seemed to offer the best buy for me at the time, okay they are not the cheapest out there but then again neither are my motors or their batteries, and as the saying goes 'don’t spoil the ship for a ha’p’orth of tar'
A bit more background, we do very little mileage in our cars, so they are parked up outside and under good quality (Classic Additions) car covers for most of the year on our drive, and have their CTEK's duly plugged in, batteries were replaced when we bought them and haven't been changed since, two of the cars (not the Merc) are electric hungry and I would say their CTEK's have paid for themselves a hundred fold. ... maybe a slight exaggeration, but you get the picture I'm sure.
One of the things I like about the CTEK is they have what are called 'comfort connectors' and these have eyelet connectors at one end to attach to the battery/remote positive connector & negative 'nut' your car's metal body (closest ground point).
This means that the 'female' part of the connectors is left in situ and the other 'male' end attached to the charger itself can be removed when not in use. The easy clip together and release of the male-female parts makes using the CTEK a simple operation. You can also get other accessories for the CTEK the extension cable, which I see is currently on offer
The comfort connectors have other benefits too, such as less risk of missing a charging cycle from one or other or both 'crocodile' clips coming off it's contact point, or worse, causing a spark with the potential of igniting any gas that may have been lying around having escaped from the battery itself.
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My set up ...
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Here are a few bits I picked out from the CTEK Q&A section but they have a vast number on there so it is worth checking out for those seeking answers on their battery chargers:
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They really do offer a great amount of help and information on their website from guides, tutorials and videos on products and you can always ask a specific question if you have one.
Here is a link to the support section:
www.ctek.com
but you will need to scroll down to access these ...
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