. endurance => +5 days: 4G off / ≈ 5 calls per day / ≈ 3 sms per day / ≈ 10 screen unlocks per day)
. charge time => 2h45 even in aeroplane mode, no audible notification and no battery percentage

It also lasts a good week with this edition of the 3210. However, I don't make phone calls often and that is clearly the main use for this mobile.

I've had it for a fortnight now.
But I haven't made any calls with it yet.
But I haven't had to charge the battery after 2 weeks on standby.

I can't say for sure but so far pretty good, battery is still above 50% after 3-4 days without much conversation.