Also called: battery degradation, capacity loss
What it does
Heat, sitting fully charged or fully empty for long periods, and very hard use speed it up. Many batteries are rated for several hundred full charge cycles before noticeably losing capacity.
Signs of a problem
- Range shorter than when new
- Bike cuts out at what the display says is 20% or 30%
Safe things to check
- A shop can test a battery's real capacity.
Looking after it
- Store it partly charged in a cool place if you won't ride for weeks.
- Avoid leaving it in a hot car or in the sun.