Winter riding, better than Summer

[GoldOxide_imp]

Thanks - this is good to know. My benchmark for this -6C example is about 60 minutes at 80 km/h with no electrically heated gear - but I use HotShots in each glove. If I stop for 15 minutes (e.g. for a coffee or some place warm), I can buy another 30 minutes at a time.

Question:

How good is the same gear with the battery off (never turned on)? That is, can you approximately determine how many riding minutes/hours you gain using the battery? Hmm, built-in LiOn battery or wired up to the bike?