I've had two instances where a fully charged Forerunner 55 showed excessive battery drain. I fully charged the device in the evening, wore it overnight, and the battery was down by 30-40% the following day. This was with no tracked activities. I've had previous Forerunner series watches that automatically went into activity mode when removed from the charger. I suspect something like that is happening here but unseen in the background. In other words, I suspect that the GPS hardware is getting turned on, causing the unexpected battery drain. I seem to be able to avoid the problem by pressing the Start/Stop button, followed by the Back button after removing the watch from the charger. Has anyone else seen this or similar behavior? Any other ideas about the issue or a solution? Thanks.
