I had a retrofitted e-bike running a Leed e-bike kit for 4 years. After 800 charge cycles the battery was toast. However this system is quite basic with both the battery management & charger.
I have replaced that bike with an e-bike running Shimano STEPS e8000. This has more sophisticated battery management (I believe it doesn't use the bottom 20% or top 20% of the battery to extend life) & a more advanced charger.
However I want to make sure I get as much out of the battery as possible. On most days I ride <10km which hardly uses any of the battery capacity.
The batteries on my old & new bikes are lithium-ion.
I've come across two theories for improving battery longevity:
- Charge every day - that the depth of the charge effects battery health more than the frequency of the charge. So frequent shallow charges is best for the battery.
- Charge infrequently when the battery reaches a certain level (say 50%). So lowering the number of charge cycles is best for the battery.
I am really curious to know which of these approaches (or another approach) is the best to extend the life of the battery.
Thank you in advance.