Why struggle with old, heavy and cumbersome technology when you can have the state of the art technology at your fingertips. Every dynamometer is samll, lightweigth and incredibly strong plus they are backed by a 10 year warranty. They are fitted with a long life wireless rechargeable battery offering up to 20,000 hrs of battery life. The dynamometer is equipped with a fast recharge so no need to ever worry about running out of juice.