Simple Battery Monitor shows the remaining time, the charge percentage, and the battery status in a compact menu bar app. It warns you with an orange arrow icon when some apps consume too much power. Time remaining adapts to your usage and when some demanding apps start consuming too much power it shows time remaining as if those consuming apps continue to run. Time remaining is for both charging and discharging. You can quickly reach to activity monitor to see per app power consumption and to system preferences to change energy saving preferences.