When the time is up, can it be re-used at its last setting or must the time be reconfigured?

Yes. Once you set the time and use start/stop button and don't use clear, it will always reset to the original time on stop.

Is there any way to turn off display, to save battery life?

LCD screens take such an infinitesimally small amount of battery current that it's not a factor in battery life at all. Mine is working fine, as opposed to the timers that a couple of other people here indicated.

Does this timer have 10 minute and/or 5 minute "warning" beeps before the time is actually is up ??

No. I beeps at the end of the time only. BTW, I discovered that it also can act as a stopwatch (i.e., counting up). I don't think there's any alarm in that mode, although I haven't let it go to 99+ minutes to see. (grin)

Item Weight	2.88 ounces
Item Dimensions D x W x H	0.5"D x 2.25"W x 2.5"H
Number of settings	3
Material Type	Plastic
Color	White

Presto 04213 Digital Timer

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