okay. The ignoring heartbeat is a debug message, when you use heartbeat timer and have the device unplugged, it looks at update_heartbeat_battery_skip. If that is greater than 0, it will ignore that many heartbeats when running on battery. So if you want it to run full speed just set that to 0. It will still skip heartbeats when the screen is off according to update_skips_when_sleeping. Btw, I would set the min to 1 and the max to 2, if you set both to 1 it won't use the heartbeat timer at all.