Concorde - 24-Volt Turbine Starting Aircraft Battery | RG-42 

ΓÇïRecombinant Gas - The RG® Series are low resistance, valve regulated lead acid (VRLA) batteries.

• Superior starting power
• Reliable essential power in the event of a generator failure
• Low impedance design
• Maintenance free
• Constructed with non removable vent valves - no addition of electrolyte or water required
• Aerobatic: Non spillable at any altitude or attitude
• Factory tested to assure airworthiness
• Shipped fully charged and ready to install
• Manufactured with absorbed glass mat separators (AGM)
• RG® Series batteries ship HAZMAT Exempt