Sometimes the simplest solutions are the most elegant. Not the Apple design kind of elegant, but rather the functionality of wheels on luggage or mini air canisters for the road cyclist.

I found the coolest gadget at Costco yesterday: a plastic case for two AA batteries with a BlackBerry adapter for charging your phone on the go.

No more cursing the fact that you forgot to charge your phone overnight, no more worrying about your battery life while checking your e-mail, no more searching for an open electrical outlet.

The cost: $20 for two (hey, it’s Costco, you can’t buy just one of anything), batteries included. Connectivity peace of mind: helpful. Bonus feature: an iPod adapter.