This 240Ah AGM (Absorbent Glass Mat) battery from power management specialists, Victron Energy, has a very low internal resistance, making it particularly suitable for use in high current draw applications using winches, bow thrusters, inverters etc.
With AGM batteries, the electrolyte is absorbed into a glass-fibre mat between the lead plates and held there by capillary action. The VRLA (Valve Regulated Lead Acid) technology ensures that the batteries are sealed for life and maintenance-free, with gas only escaping through the safety valves in the case of over-charging or cell failure. The case is constructed from fireproof ABS, and the battery has a design service life of 7-10 years.
This VRLA battery has a low self-discharge rate of 2% per month @ 20°C, so if kept cool, a fully charged battery can be stored for up to year without needing to be re-charged. It also has exceptional discharge recovery, even after occasional deep or prolonged discharge.
This battery has M8 female terminals that accept M8 bolts.
Victron AGM battery features

Victron build quality and reliability
Sealed for life and maintenance-free
Excellent high-current performance
Low self discharge
Long storage time without recharging
Exceptional discharge recovery
Approx. 600 cycles at 50% DoD
M8 female terminals on short edge: POS RHS / NEG LHS
Suggested charge current range: 24-48A
2 year warranty
Ideal for campervans, motorhomes, boats and off-grid applications