From the outside, the brick-like 5.5” by 3” by 1.2” PowerPak Ultra looks like it’s ready for anything. Obviously ruggedized with rubber edging and sealed ports, Ultra arrives in packaging claiming that it’s water-, dirt-, and shock-proof. Oddly, there are now some unusual caveats to this: the box offered no specific IPX or other independent certification for these claims, and New Trent’s web site has removed any…