Mike in CA
Well-Known Member
- First Name
- Mike
- Joined
- Jan 29, 2021
- Threads
- 14
- Messages
- 554
- Reaction score
- 802
- Location
- North Bay Area CA
- Vehicles
- 2021 Taycan 4S, 2019 e-Tron, F250 Powerstroke
I don't believe that's completely correct. While it's true that leaving lithium batteries on charge at 100% is the most problematic, there is also lots of information you can google concerning everything from cell phones to RV's that indicates simply charging lithium batteries to 100% on an everyday basis, not just leaving them on charge, reduces battery life.there is nothing bad about charging to 100% as long as you get going, the problems arise from keeping the car at high SOC for extended periods of time
Even more relevant, I own 2 EV's and the manufacturers of both say that for daily use one should only charge to 80% to preserve battery life. For example, the Audi eTron manual states specifically that "frequently charging the high voltage battery completely accelerates the aging of the battery and reduces available range".
Porsche's 2021 Taycan manual states that "adhering to the following measures can reduce the aging and wear and tear of the high-voltage battery", including "using the timer function to program a high-voltage battery charge state of approx. 80% for daily use of the vehicle without any long-distance driving".
Since I have no daily driving requirement which would make me want to constantly charge to 100% I see absolutely no reason not to follow these very specific recommendations. YMMV.
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