While nobody's exactly sure how it works, it's been clinically proven over the past 30-40 years that low levels of electrical energy, delivered straight to the nerve fibers in the spinal cord, can disrupt the signals that certain chronic pain conditions send to the brain, and replace them with a much more pleasant tingling sensation. Now, St Jude Medical has received FDA and CE mark approvals for the world's smallest and longest-lasting rechargeable neurostimulator. The Eon Mini is the size of a silver dollar, about 1cm thick (1/2 inch), and weighs only 29g (1oz). It sits under the skin of the buttock or abdomen, and its rechargeable battery should last nearly 10 years. It can be programmed by remote control to treat as many as eight different chronic pain areas and, in doing so, it can get many patients with chronic pain off morphine and back into a semblance of normal life.