Dan, temperature will definitely have an effect on range. Between 60 and 80, not so much. But if your batteries start your morning drive at (say) 45 degrees, you will have a noticeably shorter range (not 50%, but a loss of over 10%). Also, over time your range will decrease because of battery fade.
Geeks (like me) worry about babying (to a certain extent) the Li-Ion batteries for longer life (the battery WILL lose capacity over time, no matter what you do - the idea is to minimize it). I was never anal about it (well, MY definition of anal at any rate - my wife disagrees
![Wink Wink](https://fuvowners.com/images/smilies/wink.png)
) but the following generally hurt Li-Ion life, no matter the exact composition of the battery:
- extreme heat (especially *charging* when the batteries are hot)
- charging to full (and then leaving battery full for 'a long while' before use)
- the combo of the two above : a full, battery sitting in the heat (say, a full battery parked all day in the sun in 95+ degree weather)
What I tended to do (in general, not always) :
- keep battery between 20% and 80% charge (try to never fully charge or discharge)
- when I needed close to a full range, charge 'at the last moment' (charge to ~85% the night before, then charge the last 10-15%in the AM)
- don't charge when it's hot (over 90) - delay charging until the cooler evening hours
- when I knew it was going too be hot, hot, hot, limit charge to 60-70% if I could
- when I had a vehicle with active (liquid) cooling (instead of useless air cooling), use it to keep battery temp under 90F
- always had vehicle with a battery *heater*, so plug car in about 20-30 minutes before leaving to heat battery when under 45 degrees (and charge a little less than normal the night before, to not 'overfill' the battery) - and to run seat heater and car's air heater/blower
I figured that if I were careful 90% of the time, I would delay the aging of the battery significantly - I never tried for 100% 'conformance' to my rules.
If you are going to use the FUV for commuting, try to get access to a 120V plug at work, so that you can 'top up' the battery to about 80% at work (when it isn't hot). Commercial electricity is darn cheap - a FULL CHARGE (say, 10 kWh) should cost less than a buck. If you can bring your own (cheap) portable 120V EVSE ("charging cable") and padlock it to the FUV so it doesn't "walk off", you can just charge at work. Write me a PM if you want to discuss EVSEs (brands, features, essential capabilities IMO, etc).
OR, if somebody is really interested in discussions about batteries, 'chargers', charging networks, etc. then start a new thread outside of this "Sig Series' thread and I'll contribute to that one. (Y'all may have guessed that I've been driving electric for a while.)