As a general
rule, for most types of lithiums in general
, the general
conscensus seems to be
. . . . keep the SOC between 30% and 80% as much as possible
I have no idea how much extra life you'd gain by following that advice, but it pretty much cannot hurt anything, so lately we've taken to 'time charging' so that the charge ends at about 13 or 14 bars as often as practical, which for us is most of the time. Since we almost never need the extra few miles of range from a fully charged pack, this doesn't affect the practicality of the car much for us . . . . so, why not? After the rare occasion that we do pull the battery down to 2 bars or less, we usually let it cool off for an hour or so and then recharge it fully - This is probably once a month or less
Get back with me in 7 or 8 years and I'll let you know how this is working out
All that said, I'm fairly certain that Mitsu built in some pretty conservative charging algorithms into the car - How else could they warrant the battery for 8 years or 100K when they know most cars are not going to be used by 'techies' who pay particuar attention to the way they treat the battery pack?