Accu (Battery) Check

In  spring I take my "Flyer" electric bike out of the garage, I insert the accu battery and I start enjoying again.

The performance of the accu (battery) after four years of riding
is still good.

One reason may have helped to keep it going:  During the frost period of winter I did not leave it in the cold garage but took it into the house because its exposition to extreme temperatures should be avoided.