Red Octane, makers of the Guitar Hero franchise, ships a wireless controller with their third installment in the popular series. Being wireless it requires batteries. Unfortunately it does not use the Xbox 360's chargeable battery packs, so you're stuck with using AA batteries or you can buy a rechargeable battery kit from Red Octane specifically for the device (perhaps part of the reason they don't support Microsoft's solution). Being a fan of rechargeability, I opted for the latter, and purchased said kit and two batteries a few months ago.

The other day I noticed that one of my battery packs had developed a defect--a slight depression and bubble on the surface. With Sony's "exploding laptop batteries" freshly in mind, I quickly removed it from the charger and set it aside. Can't be too careful, and a deformation could indicate a defect or a internal problem.

I contacted Red Octane and explained the problem, providing photographic evidence of the failure, fully expecting some laborious process to get it replaced or refunded. To my pleasant surprise, they contacted me promptly to apologize for the inconvenience and to let me know they were shipping me a replacement free of charge.

So, goodonya Red Octane for your customer support.