V2.5 Provi...
Lo = OF... no dying battery blink, only a dead battery blink.
Lo = ON... Dying battery blink, seems to be about 4 or 5 drags worth until dead battery.
Much shorter blink cycles.
P3 = No way to alter the Low Battery Indicator. (sucks)
P3 = Low Battery Indicator comes on at 18% of remaining battery power. Blinks for a time and stops. You take a drag, and it blinks for a time and stops. (this warning is far earlier then V2.5 warning) and is not user selectable. (sucks)
Best I can describe it right now, Jim
I think Astro said it well -- as well as other posters.
On the 2.5's the blink is great, because it lets you know you will soon be out of battery. A nice feature, for sure, and a rare one and as most here know, most mods had Zero way in times past. As I usually use mine with light off, it only blinks when there are a few pulls left. I don't do the tricks of turning down and reinserting battery anymore. I've got other devices with me! I do however, loosen the battery cap if I can't change it that instant.
On the P3 I quickly adjusted to no blink -- or just a tad at the end of battery life -- and used the %. Then I got the upgrade --- yellow blink (caution). It blinks 15 - 20 times (lost count, but less than a minute and then stops and if you vape again, a new series of blinks is begun.
I don't like that change. Since we do have a % indicator readily available, like some others, I'd rather have the blink start much later or be able to set custom, though I am glad that if one does simply sets the device aside, it's not giving caution signal forever. However, it does blink red after the % is zero. I double checked, and that will turn off by turning off the device.
Usually, I do change battery sometime during that caution period! Though I like the feature, many times I would have loved to be able to simply have it turn off when I shut down the device.
It is unclear to me what the radii will do -- but it sure looks like the blink is only at or near the very end, just before the device shuts off and I would think it could be turned off by shutting down the device.