China, 2025. Beijing Betavolt New Energy Technology has created a miniature nuclear battery, the BV100, capable of producing 100 microwatts at 3 volts for 50 years.
The battery uses nickel-63 isotope, which decays into stable copper, generating continuous current via diamond semiconductors. The design includes a two-micron nickel sheet between two ten-micron diamond layers, converting decay into electricity through betavoltaic energy conversion.
Betavolt plans to launch a 1-watt version this year for drones, remote sensors, and implantable medical devices. The battery's energy density is ten times that of lithium batteries, and it operates between -60°C and 120°C without leaks or self-discharge.