I have a small fan heater pointed at the bike when i charge it below freezing, and put the heater fan on 30mins before taking the bike out for ride, the battery takes 30secs to remove, 1 bolt.
Just makes it a bit slacker, i had 170mm on my 2018 model and had no issues, coil or air is up to you depending on what you are riding. Coil will always feel better but adds a little weight
I have the older version, but this seems to be its replacment
https://www.themudhugger.co.uk/collections/front-mudhugger-mountain-bike-mudguards/products/mudhugger-evo-ziptie-fitting?variant=32833361018962
I am sure they can answer that via an email for you. I have had 3 different types of MagicShine over the last few years and all have failed in some way or another. Batteries dying, LEDS failing, connectors breaking, cases made of cheap plastics that easly crack, and overpriced for what you get...
https://www.valostore.se/sv/produkt/cykellampa_for_elcykel_light5_eb2000_brose
I higly recommend this light, took me 30min install, great quality, good light output and has a light sensor in it so starts up when you turn the bike on (if its dark :). From a scandinavian site but i am sure they...