Words and Images by Kraig Willett
In 2002 I bought a used SRM Pro powermeter. I’ve had the crank battery replaced once in the past 9 years (less than 20,000 km). Since day one, the powercontrol (the head unit) battery has been a bit problematic. First of all, the display that supposedly shows how much battery life was remaining was unreliable. For example, the PCV display might have said that I had 25 of 29 hours left on the charge, but inevitably, it would run out after only a few hours. Secondly, and probably related to what is mentioned above, is that the battery just wouldn’t hold a charge for very long.