Review of Battery Charger for Xbox 360 Controllers by Protomario
334With no power your devices are useless.
Rechargeable Battery Pack
Battery Pack, Play and Charge Cable and Quick Charger
The Rechargeable Battery Pack for the Xbox 360 controller contains two AA nickel metal hydride (NiMH) batteries inside a sealed casing, with a custom connector on the rear to allow charging through the Xbox 360 controller itself.[8] The pack provides up to 25 hours of continuous gaming for the wireless controller. It is recommended, due to the replacement cost (which factors in both economic and environmental terms), in place of disposable AA batteries. It also ships as part of the Play & Charge Kit and as part of the Quick Charge Kit. Third party rechargeable battery pack kits are also available. Although the official rechargeable battery pack is NiMH and it is common to find NiMH AA rechargeable batteries, the normal (AA) battery casing states "Use only Alkaline battery, type AA (LR6)".
[edit] Play and Charge Kit
The Play & Charge Kit contains a rechargeable battery pack and a USB charging cable. Use of the charging cable does not affect the functionality of the controller, and may be used without interruption to game play. The Play & Charge cable also allows use of a wireless controller without a battery pack. When doing so, Microsoft recommends using a AA pack (empty) to avoid damage to the exposed battery compartment.[9] When connected, the controller does not act as a wired controller, but continues to communicate with the console or receiver wirelessly; data is sent via USB to the host only to allow automatic syncing and to initiate charging and does not send controller input data.[10] As a result, the cable need not be plugged into the console or computer the controller is being used with - any convenient powered USB port may be used.
The original Play & Charge Kit contains generic 2100mAh AA (LR6) NiMH cells.[11][12] Such cells are readily available in 4 packs up to 3000mAh, with 2000-2600mAh batteries being common.
Alongside the release of the Xbox 360 S in June 2010 Microsoft started shipping an improved Play & Charge Kit using larger capacity batteries.[13] Original Play & Charge Kits provided up to 25 hours of play,[14] the improved version lasts 35 hours if charged using the Play & Charge Kit[15] or 40 hours if using the Quick Charge Kit. Quick Charge Kit
The Quick Charge Kit is a small base station which charges up to two rechargeable battery packs and does so in less time than the Play and Charge Kit. It comes with a dual-charger and one rechargeable battery pack. It takes 2 hours for each of 2 battery packs to be fully charged. A light on the unit is used to indicate status, showing green it is finished charging/fully charged and red when charging.
Reference-
http://en.wikipedia.org/wiki/Xbox_360_accessories