SUUNTO Ambit2 R GPS Training Watch Water Resistance - 50m (according to ISO 6425). Battery Life - In time mode: 14 days. GPS active: 8, 12, 25h (dependent on recording rate). Battery Type - Rechargeable lithium-ion. Firmware Upgradable - Yes. Time/Date - Alarm clock; dual time; GPS timekeeping; countdown timer; stopwatch timer.