Moshi's Revolt Duo 20W Dual-Port USB Car Charger ($25) might not necessarily be exciting, but for those charging multiple iPads in the car, it could be a useful accessory. The plastic charger has a rounded-square face, with the two ports parallel to one another. Each can put out 2.1-Amps of charging power at the same time, so every iDevice except for third- and fourth-generation iPads will charge at full-speed. The more recent tablets will still charge,…