I've had the same P&C kit since I bought my first 360 on August 2006.
The actual console died just under a year later, at which point I returned it for a replacement with the retailer.
That replacement died about 6 months later.
When it returned from being repaired with MS, the
P&C kit gradually began to stop working properly.
First of all it would not remain charging after I switched of the console, using the guide button to select the on screen switch off option.
Then it started giving me the green "fully charged" light after only a few minutes, even when charging the battery from flat.
The repaired console died two weeks ago and has been replaced by MS.
Then as of yesterday, I get the green light 15 seconds after plugging in the P&C kit.
As soon as I unplug the kit, the battery is dead again.
I've tried more than one battery and more than one controller with the same lead with the same results.
Anyone else had this problem, and should I cut my losses and buy a new kit?