-- Includes 1 Lithium Manganese Dioxide battery with replacement instructions, Battery is 12.0V, 4.7amp-hours -- Capacity (at 20°C) Will provide 166 200 joule shocks (with one minute of CPR between shocks) or 103 360 joules shocks (with one minute of CPR between shocks) or 800 minutes of operating time -- Standby Life (assuming daily tests only): A new battery provides device power for 4 years if installed in device that is not used -- Replace Battery Indication: At least 6 shocks and 30 minutes of operating time remain when first indicated