Battery For Stannah Stair Lift Is your Stannah Stairlift showing weird signs for instance Stannah 420 Model alarm will not go off, or a Stannah stairlift not rising up? Or, maybe the digits on the Stannah manage unit are going all over the place? Just how long has it been since you exchanged the battery for the Stannah Chair Lift? Stannah Stairlifts Battery Life Subsequent to just 3-5 years roughly, with continuous charge depletion and charging, like every other battery, the Stannah stairlift battery will progressively lose its charge and ultimately stop supplying sufficiently high current for typical stairlift functionality. Like an electric car, both the power plus the unit's controls with the stairlift are powered by the stairlift battery pack. When the battery pack gets to be old and consumed, its voltage drops. When this takes place, the control instruments come to be untrustworthy, as does the travel system.