The SMILE Plug includes a 5V Lithium-Ion polymer battery for back-up power, making it ideal for learning environments where electrical power can be inconsistent.

ENGADGET: blogger-avatar

The 8X motherboard sports an increased voltage of 1.5V, and a second amplifier delivers over 2.5V to the 3.5mm headphone jack.

FORBES: HTC Announces 'The Signature Windows Phone' 8X Smartphone

Operating with a voltage of 1.35V, according to Samsung tests it provides an average 70% power savings (per unit density) over a 50nm class equivalent, 1.5V DDR3-based RDIMM.

ENGADGET: Samsung bringing 85-inch ultra high definition TV to CES HD

Connect that 220 ohm resistor to 5V on your breadboard.

ENGADGET: How-To Control Csound with a Custom Midi Controller: Hardware (2 of 2)

Connectivity comes via Gigabit Ethernet and a WiFi dongle roughly the size of a wireless mouse receiver protruding from its base, and a 5V socket provides Transporter with power.

ENGADGET: Hands-on with Transporter, the peer-to-peer social storage solution

In the box you'll find a 5V 1.8A AC adapter (vs. 1.2A for the one supplied with the Nexus 4) along with a micro-USB cable (longer than the one provided with the handset).

ENGADGET

But what you're about to hear after the break is the next-gen TFA9890, which is expected to appear in devices around the middle of this year, and which racks things all the way up to 9.5V.

ENGADGET

The above diagram suggests said slate has a microSD slot accessible from the outside, and if you take a closer look at the product label, you'll see that the device requires a whooping 2.5A input at 5V, which means it'll come with a 12.5W adapter -- a lot higher than many tablets' maximum consumption at 10W (including the new iPad) or below.

ENGADGET: Lenovo IdeaTab S2109 teased by FCC, launching with 9.7-inch display this month?