A set of 25r's last me usually all day, either at 50w in power mode or 400f on my TC builds, chain vaping often through the day. Other 2 bat mods get slightly longer power, but I'm happy with it. TC, once dialed in, is excellent for such a cheap mod. The 25 amp limit isn't of any concern to me, I'm nowhere near it. The new grey color is showing no scratches or wear, but the black plastic display strip has picked up a few minor scratches on it from pocketing. Only drawback I have is weight, suckers heavy, and you know it's in your pocket while out n about. For the price and performance, I'd highly recommend it.
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There is a clear protective film that can be removed from the display glass.