A local network of implants uses your body as the wiring

Georgia Tech researchers built SWANS, a network that sends signals between medical implants through body tissue instead of power-hungry radios, like neurons do with ions. A wearable hub fires voltage pulses through a microneedle patch, and each implant switches on only when a pulse fits its strength and length, so they draw almost no power; the setup extends battery life 15 times over Bluetooth.

Summary written with AI by HowTechMoves, based on reporting by Ars Technica.