3,552 DAYS OF RESEARCH & DEVELOPMENT For more than 10 years we have been working on the X-BIONIC Energy Accumulator. Each year it has performed even better. Each year the trophies we won for it piled up - today we have 15 internationally renowned design prizes, not to mention innumerable top test results. This makes us very proud, but it doesn't put an end to our ambition to make it even better. With the Energy Accumulator EVO it's now come down to precision work. We aren't changing the entire concept, but we just hammer away on each small detail. If you optimise the single features, you end up improving the entire system.