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ThanksYou will find it takes a lot longer to get to 100% than you think. M3P takes about 1hour per 10% but you will find the last 10% probably takes 2 hours.
It is not really recommended to leave for long periods at >90% if it was me, and not a lease car I would charge to 90% overnight then put it back on an hour before I go. It would probably only get to 97% but close enough.
Edit
Great minds Mr H
You will find it takes a lot longer to get to 100% than you think. M3P takes about 1hour per 10% but you will find the last 10% probably takes 2 hours.
It is not really recommended to leave for long periods at >90% if it was me, and not a lease car I would charge to 90% overnight then put it back on an hour before I go. It would probably only get to 97% but close enough.
Edit
Great minds Mr H
Thanks this is what I figured.I usually charge to 90% during the cheap rate and then set it going again 1 hour or so before i'm leaving, if i need 100%. Not a good idea to leave it sat at 100%.
And no regen braking might catch you out, you'll need to use the brakes.Just remember next to no regen above ~92% so the final 10% won’t give as much extra range as you may expect if first part of journey on more twisty/stop-start roads.
You will find it takes a lot longer to get to 100% than you think. M3P takes about 1hour per 10% but you will find the last 10% probably takes 2 hours.
It is not really recommended to leave for long periods at >90% if it was me, and not a lease car I would charge to 90% overnight then put it back on an hour before I go. It would probably only get to 97% but close enough.
Edit
Great minds Mr H
Jeeez. Just charge it!
I have seen many folks employ that same strategy to gas powered cars. “Just drive it”. Many of those either ran out of oil, or had the oil turn to tar…Jeeez. Just charge it!
As you have kinda mentioned the other advantage of doing the last 10% before you leave is that it will warm up the battery a bit so you won't be leaving with it stone cold.And no regen braking might catch you out, you'll need to use the brakes.
My understanding is that 40-80% optimum for parked, 100 for short periods is better than 0-20%.
Most of the time, I'd set it to 90% overnight & top-up/warm the car in the morning - but sometimes I've left it at 100% for a few hours for early starts.
I also have no fear of arriving at a destination near zero as long as I know I can charge straight away. I've rarely done this, but it wouldn't worry me. Long term near empty is what should be avoided.
Unless you have LFP (some SR+), which is happy at 0-100%
I was wondering how long it would take for someone to come back with that suggestion. 4 hours. I was expecting 4 minutes. And yes you can do that but that is not what the manufacturer recommends and the science behind Li Ion batteries is pretty well established and supports their recommendations. Charging to and holding at a high state of charge degrades the battery significantly faster than not doing so.Jeeez. Just charge it!
It is. Even iPhones try to intelligently control the last bit of charging so that it is full just as you start using it again in the morning. I suppose the difference is that the modems and background app updates start to drain the battery immediately whereas the car won't until you drive it.… the science behind Li Ion batteries is pretty well established …
There is also possibly a danger of overthinking it to the point where your enjoyment or convenience is significantly impacted, "keeping your girlfriend chaste for the next guy" if you want a more sordid analogy.
Actually the regen starts between 97% and 98% but is limited until you get to 95%...at least in my 2021 M3LR.Just remember next to no regen above ~92% so the final 10% won’t give as much extra range as you may expect if first part of journey on more twisty/stop-start roads.
Anecdotally but I just recently sold my 3 year old iPhone, which was charged every night to 100% and often left sat on a wireless charging mat sitting on 100% while I work, and after those 3 years I had 93% battery health.