Got this one at Wal Mart.
$16.00 Works well! Very well constructed.
Quick,safe 10W (2.1A) charging.
It will charge your cell phone in half the time, but don't make a habit of it.
Not too long ago I picked up the Belkin 2.1A car micro (stubby) USB charger from WalMart... p/n F8J002TT
Cost around $17 in-store. A Google search/shopping shows them around $15 now.
Works perfect! (though does get warm, but Belkin is typically a reliable brand)