... , 400Ah Capacity, 2)Self-discharge 3)Maintenance free battery. Sealed lead acid battery 2v400AH:The sealed lead acid battery is widely applied for new energy, ... do have a normal open circuit voltage without leakage, batteries swelling or cracking problem after one-hour vibration.4 ... normal open circuit voltage and be without leakage or batteries swelling or cracking after droping three times from ...