Simer A5000 Ace In The Hole Battery Back Up Sump Pump System Emergency; fully automatic back-up sump pump system. Battery Sold Separately. System will operate in event of primary pump failure or power outage. Requires a 12 automotive type battery. Sold separately Maximum pumping capacity to 1380 gallons per hour. Standard 2 amp charger fully recharges battery in 42 hrs.