It's 2013: What's the best E39 cigarette lighter power adapter at the best price?

We've all evolved - but there is still much to learn.

What do you currently use for a cigarette lighter power adapter in your Bimmer?
Why?
(i.e., what can the rest of us learn from your setup?)

In the olden days, most of us use separate proprietary power adapters (perhaps with a y-splitter) in the cigarette lighter socket to power our cellphones and GPS units and to recharge our bluetooth devices.

Some added dedicated power & others used the existing glovebox flashlight charger:
- Adding new fuses & wiring in the engine bay (1) & all about the BMW Glovebox Flashlight Cigarette Lighter Power Adapter (1) (2) (3) & how to install a Valentine or Escort radar detector (1) (2)

But most of us simply use the cigarette lighter, with an adapter.

So that we can all benefit, I ask, for 2013:

Q: What do you use for cigarette lighter power adapter for your portable electronics?

EDIT: See also: It's 2013: What do you currently use for handsfree cellphone & audio in your Bimmer?

So that others benefit from my research (and multiple mistakes!), I bought a dual-USB charger for about $15 at Frys; but it's only about $10 on the net (exclusive of tax/shipping).
But, with these USB power adapters, there is MUCH DUPLICITY abounding in the packaging! Caveat emptor!

Given that this is a system, here are the specifications I recommend you shoot for in a power adapter:

• Dual USB (simultaneously - don't be tricked by the two ports - look at the specifications to ensure BOTH can be used at the same time!)
• 2.1 amp (in at least one slot - this isn't critical unless you have an iPad - but it's nice and doesn't cost more, in practice)
• 1.0 amp (in the second slot, as an amp is mandatory for today's power hungry devices)
• Total should be 3.1 Amps, and 15 Watts (not 10 Watts which many dual-slot devices are because they don't deliver that power simultaneously!)
• Fused (is nice)
• Ceramic (would be nice)
• Lighted (a nice option)
• Labelled (some don't label which slot is the 2.1 amp slot!)

Note: If it doesn't SAY what the amperage is, then it's probably 500ma, which just won't cut it for the smart phones of today.
Note: If it doesn't say what the wattage is, then it's probably only 10 Watts, because both slots can't be used simultaneously!

Here is a picture of mine: (If you can find a BETTER power adapter, please let me know!)


You can get this a 15 Watt low profile (ceramic?) 3.1 Amp (2.1 + 1.0) dual-USB charger for about $10 on the net.

It would be nice if fellow bimmerfesters find a good source so others benefit.

Here's just one to give users an idea of what they should shoot for.


Be careful NOT to get the 10-Watt version (which looks the same!).
(The difference is that you want BOTH ports to be used simultaneously.)