Classification Lead-acid
Chemistry Lead sulphate
Nominal voltage 6V
Capacity 4–6 Ah
Rechargeable Yes
Specifications Deep Cycle Flooded Sealed
Power to weight ratio 30–50Wh/kg
Discharge rate Up to 80%
Flooded Sealed
Have removable caps on cell tops to allow for a top-up of distilled water Sealed and maintenance-free
More expensive Less expensive
Store less energy Store 10-15% more energy
Not as quick-charging Charge up to 4 times faster
Can become damaged from forceful movement Are stronger
Can have a reduced lifespan in extreme climates, where the water inside them can evaporate or freeze Only contain enough liquid to allow electrolytes to flow and can withstand varying climates better
Longer lasting Not as long-lasting