ASUS R400DE Battery

The hand-rest regions and the touchpad are hard and cool. Asus has placed the heat-emitting components near the middle and this allows the air to move around the case. The large flap on the bottom of the case hides a 2.5-inch hard drive and a 4 GB DDR3 RAM module (one slot occupied, the other is free). ASUS R400A Battery

A look at the connectivity speaks volumes: we no longer deal with the P53E (15.6-inch) with its consumer interfaces, but with the complete opposite. The most noticeable features would be the three monitor interfaces: VGA, HDMI and DisplayPort. We have never seen this trio all together on a laptop before. The eSATA interface is also provided, which makes connecting external hard drives easy. The laptop can also connect to USB 3.0 HDDs. If the user is not satisfied with the interfaces of the B43E and its docking station, they can add additional ports using an adapter in the ExpressCard34 slot. Does this laptop leave any stone unturned? ASUS R400D Battery

It would have been nice to have an integrated HSDPA modem in the test model. The manufacturer did prepare for such a module by creating a SIM card slot under the battery, but sadly, Asus does not offer any configuration of the model with such a modem. Instead, the manufacturer has installed a LSI HDA 56K modem. Of course, it cannot replace broadband internet, but the B43E can receive and send traditional faxes. Plus, in regions where there is no broadband internet, the user could access their email. ASUS R400DE Battery

Overall, most users will make more use of the Atheros DraftN WLAN or the Realtek Gigabit Ethernet modules. The laptop includes Bluetooth 2.1, which allows it to connect to smartphones and other peripheral devices wirelessly. Unfortunately, this version is quite outdated as Bluetooth 4.0 is already out. ASUS R400DR Battery

This is where it gets interesting: Asus has installed a TPM module (Trusted Platform Module) and a SmartCard reader (at the front, below the card reader). Amongst the direct competition, only the Lifebook S751 offers such a configuration. The ThinkPad L430 and ProBook 6465b may not offer this combination, but it can be found in the more expensive T-series ThinkPads/EliteBooks. ASUS R400N Battery