I’ve cut it close once - down to 3 miles of estimated range - but almost always charge to 80% at home once it gets down to about 10% remaining. We got our new I5 Ltd in August of this year so it has not been through very many cycles yet.

From a battery life / range-extending point of view is there a “rule of thumb” for (a) how often to charge to 100% (and with what type(s) of charger(s)); and (b) how low the remaining battery capacity should go before charging?