PC Micro Store offers its PCMS Universal Vehicle Car Charger Power Cable model no. UI-UNIV-GPS-CAR, for $15.80. Coupon code "50%GPSCar" drops it to $7.90. With free shipping, that's an $8 drop and the lowest total price we could find for a similar charger by $4. It's compatible with most GPS navigators and features five interchangeable adapter heads. Deal expires after 1,000 redemptions.