Power Cables: The typical power cable is around 6ft. long. Popular connectors include IEC C5 (also known as a Mickey Mouse connector), IEC C7, and a polarized IEC C7. IEC C5 connectors are more typical on laptops while IEC C7 connectors are usually found on camera battery chargers. These cables are probably the bulkiest items, and just two or three of them will all but fill the Think Tank Cable Management 10 pouch. These cables can be minimized by purchasing either 1ft versions or right-angle adapters as shown here:
USB Cables: Similar to power cables, there are various USB cables you might have, including cables for an iPad and cameras, all of which are typically 6ft as well. Camera cables typically have USB Mini-5 connectors, USB Mini-8, and USB Micro 8 connectors. Many times you can find these cables in 1 ft lengths, or you can use a universal cable adapter kit such as the JDI GoldX kit which consists of a cable and various adapters. Note that as shown in the attached video, you may wish to purchase additional adapters with the JDI kit.
Other Adapters: One nice item is the Belkin combo Surge Suppressor, outlet expander, and dual USB charger. If you have the room in your photo bag, it's a nice to have.
OEM Chargers: One item you may want to avoid are third-party camera chargers (as well as batteries). The primary issue is fast charging your batteries with a charger of unknown quality and capability. You could quickly destroy an expensive camera battery by improperly charging/overcharging it. Only use the manufacturer provided batteries and chargers in your equipment.
When a manufacturer specifies a battery, the charger is designed to safely charge the battery - both in primary and trickle charge states. A typical 3rd party charger is more-or-less a universal charger, designed for many different batteries. There is no way that a charger such as this can anticipate the battery's voltage and capacity - and without these factors, a charger cannot properly fast charge a battery.
If you need to buy a 3rd party charger - the only safe ones are the SLOW, or overnight chargers that require 16 hours to recharge a battery. These chargers will not typically damage a battery in the overcharge state.
Often, 3rd party batteries have different voltages and capacities, so in a similar fashion, the OEM charger may not be able to properly charge it as it is expecting a different battery.
In the worst case, mixing 3rd party chargers and batteries may result in damage to the battery, charger, or even camera. At best, the battery may not perform as well as it could.
Additional Battery Charger Ideas: Lenmar makes a pretty nice universal battery charger that is worth looking into; however, it is not probably going to save much space unless you also use rechargeable AA batteries for devices such as flash units. Lenmar's BCUNI3 adjustable charger can detect the battery voltage and chemistry and auto charge virtually any LiMH or Li-Ion battery. It also has a nice USB charging jack. If you only need to charge AA batteries, then Lenmar's R2G804U 4 hour charger will charge 4 LiMH batteries in 4 hours, and also includes a USB charging jack.
BCUNI3 Battery Compatibility chart
Conclusion: By replacing the long power and USB cables, I am able to get all of my cables and adapters into a Think Tank Photo Cable Management 10 pouch. This easily fits into my photo bag.
RadTech ProCable Shortz 20cm Charge/Sync Cable for all iPods and iPhones (Black)
Belkin BZ103050vTVL Mini Surge Protector/Dual USB Charger