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Glossary
Technical Glossary
Leisure battery
A leisure battery is designed to run auxiliary loads such as lighting, pumps, control panels, refrigeration and habitation equipment rather than simply delivering a short burst of engine-starting current. In caravans, campervans and motorhomes, leisure batteries are typically used to supply the living side of the electrical system.
Marine battery
A marine battery is intended for use in boats and other watercraft, where vibration resistance, starting performance and resistance to harsher operating conditions matter more than in a typical road vehicle installation. Some marine batteries are built mainly for engine starting, while others are designed for dual-purpose or auxiliary duties.
EFB (Enhanced Flooded Battery)
An EFB battery is a step up from a conventional flooded lead-acid battery. It is designed to provide better cycle durability, improved charge acceptance and stronger repeated charge / discharge performance, while still remaining within the broader lead-acid family. In leisure systems, EFB can make sense where a standard flooded battery is not quite enough but AGM or lithium is not necessary.
LiFePO4
LiFePO4 stands for Lithium Iron Phosphate, a lithium battery chemistry widely used in leisure, marine and off-grid systems. Compared with conventional lead-acid batteries, LiFePO4 batteries typically offer lower weight, deeper usable discharge, faster charging and much higher cycle life, but they also require suitable charging arrangements and battery protection.
BMS (Battery Management System)
A Battery Management System, or BMS, is the electronic control and protection system built into many lithium batteries. It monitors cell voltage, temperature and current, and helps protect the battery against conditions such as overcharge, over-discharge, short circuit and excessive current draw.
CCA (Cold Cranking Amps)
CCA stands for Cold Cranking Amps. It is a measure of how much current a battery can deliver for engine starting under low-temperature test conditions. In simple terms, it gives an indication of how well a battery can provide a strong short-duration burst of starting current.
MCA (Marine Cranking Amps)
MCA stands for Marine Cranking Amps. It is similar to CCA, but measured under marine-oriented test conditions at a warmer temperature. Marine batteries often quote both CCA and MCA to show their starting capability in different contexts.
Dual-purpose battery
A dual-purpose battery is intended to do both jobs: provide starting current and also supply auxiliary loads. It sits somewhere between a dedicated starter battery and a dedicated leisure battery, and is commonly used in marine, trailer and horsebox applications where one battery may be expected to support both engine starting and service loads.