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The cold is a drag.
I've read that using the battery in cold weather is doesn't harm it, just temporarily decreases it's capacity to discharge efficiently.
Charging the battery in cold is bad for it, however. Shimano have a thermostat in the battery that disallows charging below 0°C, in fact. When winter, I bring mine inside to charge and "usually try" to wait until it warms up a bit before plugging it in. In warmer months, the whole kit lives in the garage.
Tldr
bright
@Vince
Got a new battery for my Douze as the range is very limited in cold weather (sub 5 degrees) and under load (80+kg on top of my weight). Range has not been an issue this year as the weather has been good.
In cold conditions, I would get about 15 miles tops out of it. It is a MPF Drive 6.0 assistance with a MPF Juice 12 battery.
I looked around for a long while to get a half decent price but all prices were nuts:
I found a French company called Doctibike who were great to deal with and had the best price and offered free shipping to the UK.
End price is 380.90€ + VAT
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