{"title":"Marine Batteries","description":"\u003cp\u003eLucas marine batteries cover the different electrical jobs found aboard compatible motorboats, sailing boats, RIBs, fishing boats and other small craft. Depending on the installation, a boat may need a dedicated battery for starting the engine, a separate service battery for onboard equipment or a dual-purpose battery designed to provide both starting and auxiliary performance.\u003c\/p\u003e\n\n\u003cp\u003eChoosing by voltage or Ah alone can lead to the wrong result. Begin with the battery’s job, then compare the required cranking output, capacity, dimensions, terminal layout, technology, weight and charging arrangement.\u003c\/p\u003e\n\n\u003ch3\u003eStarter, service or dual-purpose marine battery?\u003c\/h3\u003e\n\n\u003cp\u003eThe three main marine battery roles are different:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine starter battery:\u003c\/strong\u003e provides the short, high-current output needed to crank an inboard or outboard engine.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eService or auxiliary battery:\u003c\/strong\u003e supplies onboard equipment over a longer period while the engine is stopped.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-purpose battery:\u003c\/strong\u003e combines useful starting ability with greater tolerance of auxiliary use where the boat and electrical design permit one battery to perform both roles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eA dual-purpose description does not make one battery suitable for every engine or electrical load. Match the product to the actual system rather than assuming it can replace any starter or service battery of a similar physical size.\u003c\/p\u003e\n\n\u003ch3\u003eChoosing a marine engine-starting battery\u003c\/h3\u003e\n\n\u003cp\u003eFor engine starting, use the boat or engine manufacturer’s stated minimum battery specification. Match the nominal voltage and required cranking output, paying attention to the test standard used for the published figure.\u003c\/p\u003e\n\n\u003cp\u003eAh capacity is not a substitute for adequate cranking performance. Two 12V batteries can have similar Ah ratings but different ability to turn an engine at the required speed. Also check that the terminals, polarity and cables suit the engine installation without modification.\u003c\/p\u003e\n\n\u003ch3\u003eChoosing a battery for onboard electrical equipment\u003c\/h3\u003e\n\n\u003cp\u003eA service battery may support navigation equipment, VHF radio, lighting, pumps, instruments, refrigeration and other onboard circuits. Capacity should reflect the equipment in use, the time between charges and the reserve required for essential systems.\u003c\/p\u003e\n\n\u003cp\u003eEquipment such as an electric anchor windlass, bow thruster or inverter can impose a high current even when it runs only briefly. These loads require correctly specified batteries, cables, fuses, switches and charging equipment. Do not increase battery capacity without checking the complete installation.\u003c\/p\u003e\n\n\u003ch3\u003eKeep reliable starting power in reserve\u003c\/h3\u003e\n\n\u003cp\u003eWhere space and electrical design allow, separating the engine-starting battery from the service supply helps prevent onboard equipment from leaving the engine unable to start. Boats may use a selector switch, isolator, voltage-sensitive relay, charge splitter or another arrangement to manage the banks.\u003c\/p\u003e\n\n\u003cp\u003eDo not change switch positions or battery-bank wiring unless you understand the system. Incorrect operation can disconnect charging, combine a weak battery with a healthy one or interrupt power to important equipment. Have unclear or unlabelled systems inspected by a competent marine electrician.\u003c\/p\u003e\n\n\u003ch3\u003eMatch every marine charging source\u003c\/h3\u003e\n\n\u003cp\u003eBoat batteries may be charged by the engine alternator, a shore-power charger, solar controller, wind generator or more than one source. Every charging device must support the battery voltage, technology and required charge profile.\u003c\/p\u003e\n\n\u003cp\u003eIf the boat has separate starter and service banks, confirm how each bank receives charge and whether the charger has suitable independent outputs or battery-management equipment. A battery that is repeatedly left partly charged will not deliver the performance expected from its advertised capacity.\u003c\/p\u003e\n\n\u003ch3\u003eMeasure the battery location before ordering\u003c\/h3\u003e\n\n\u003cp\u003eBattery spaces aboard boats can be restricted, and access may be more difficult than the external locker suggests. Measure length, width and total height to the top of the terminals. Check cable reach, terminal type, polarity, lifting access, retaining straps or clamps and clearance beneath covers.\u003c\/p\u003e\n\n\u003cp\u003eThe battery must remain securely restrained against movement caused by acceleration, waves, wake, heeling or trailering. Do not install a battery that cannot be fixed in the approved position or that leaves an unprotected terminal close to conductive metalwork.\u003c\/p\u003e\n\n\u003ch3\u003eProtect the electrical system from the marine environment\u003c\/h3\u003e\n\n\u003cp\u003eMoisture, salt residue, vibration and poor connections can cause voltage loss and deterioration. Keep the battery location as clean and dry as the installation allows, inspect cables and terminals regularly and investigate corrosion, loose connections, damaged insulation or signs of water ingress.\u003c\/p\u003e\n\n\u003cp\u003eTerminal connections must be tight and protected using appropriate covers and marine installation practices. Do not place loose tools, fishing equipment or other conductive objects where they could bridge the battery terminals.\u003c\/p\u003e\n\n\u003ch3\u003eBattery technology must suit the boat\u003c\/h3\u003e\n\n\u003cp\u003eFlooded, calcium, AGM, gel and lithium batteries can require different charging, ventilation, protection and monitoring arrangements. A replacement that fits the same tray is not automatically compatible with the existing alternator regulator, shore charger or battery monitor.\u003c\/p\u003e\n\n\u003cp\u003eUse a battery technology approved for the installation location and orientation. Obtain professional advice before changing technology, particularly where batteries are installed below deck, inside accommodation or as part of a multiple-battery bank.\u003c\/p\u003e\n\n\u003ch3\u003eReplacing more than one marine battery\u003c\/h3\u003e\n\n\u003cp\u003eBatteries operating together in one series or parallel bank should normally be the same model, voltage, capacity, technology and age. Combining a new battery with an older or different unit can cause unequal charging and discharge.\u003c\/p\u003e\n\n\u003cp\u003eBefore replacing part of a bank, test each battery individually and check the charger and connections. Replace the complete matched set where the equipment or system manufacturer requires it.\u003c\/p\u003e\n\n\u003ch3\u003eSeasonal storage and battery checks\u003c\/h3\u003e\n\n\u003cp\u003eBoats can retain small electrical loads from alarms, automatic bilge pumps, monitoring equipment or other circuits while unattended. Establish which equipment must remain powered and follow the boat and battery manufacturers’ storage-charging instructions.\u003c\/p\u003e\n\n\u003cp\u003eBefore returning the boat to service, inspect and test the batteries, connections, charging system and isolation switches. Investigate slow cranking, rapidly falling voltage, reduced time between charges or recurring low-voltage alarms rather than assuming capacity alone is responsible.\u003c\/p\u003e\n\n\u003ch3\u003eMarine battery replacement safety\u003c\/h3\u003e\n\n\u003cp\u003eIsolate shore power, solar, wind and engine charging sources as directed before working on the battery system. Turn off connected circuits, remove metal jewellery and prevent tools from contacting both terminals. Batteries can deliver extremely high current through a short circuit.\u003c\/p\u003e\n\n\u003cp\u003eStop using a battery that becomes swollen, cracked, leaking, unusually hot or physically damaged. Never open, burn or place an old battery in household waste; protect its terminals and use an appropriate battery-recycling route.\u003c\/p\u003e\n\n\u003ch3\u003eFind the correct Lucas marine battery\u003c\/h3\u003e\n\n\u003cp\u003eCompare the Lucas marine batteries above by intended role, voltage, cranking output, Ah capacity, dimensions, terminals and weight. For help, send us the boat and engine details, the old battery reference and clear photographs of its label, terminals, battery location and wiring. Tell us whether the battery is used for engine starting, onboard equipment or both, and provide details of the alternator, shore charger and any solar system. We can then help compare the closest suitable Lucas marine options.\u003c\/p\u003e","products":[{"product_id":"ll22-lucas-premium-12v-75ah-leisure-battery","title":"LL22 Lucas Premium 12V 75Ah Leisure Battery","description":"\u003cp\u003eLL22 Lucas Premium 12V 75Ah Leisure Battery from the Lucas Premium leisure battery range.\u003c\/p\u003e\u003cp\u003eDesigned for caravans, motorhomes, campervans, boats and compatible leisure applications. Please compare the specifications below with your existing battery before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LL22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 75Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking:\u003c\/strong\u003e 420 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 266 x 175 x 225 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal type:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase size:\u003c\/strong\u003e D26\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 17.22 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help confirming compatibility? Contact our UK Lucas battery specialists before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54554197459286,"sku":"LL22","price":89.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/lucas-ll22mf.jpg?v=1784623683"},{"product_id":"ll26-lucas-premium-12v-95ah-leisure-battery","title":"LL26 Lucas Premium 12V 95Ah Leisure Battery","description":"\u003cp\u003eLL26 Lucas Premium 12V 95Ah Leisure Battery from the Lucas Premium leisure battery range.\u003c\/p\u003e\u003cp\u003eDesigned for caravans, motorhomes, campervans, boats and compatible leisure applications. Please compare the specifications below with your existing battery before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LL26\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 95Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking:\u003c\/strong\u003e 720 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 302 x 175 x 225 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal type:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase size:\u003c\/strong\u003e D31\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20.8 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help confirming compatibility? Contact our UK Lucas battery specialists before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54554199228758,"sku":"LL26","price":109.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/lucas-ll26mf.jpg?v=1784623714"},{"product_id":"ll35-lucas-premium-12v-120ah-leisure-battery","title":"LL35 (LX35) Lucas Premium 12V 120Ah Leisure Battery","description":"\u003cp\u003eLL35 Lucas Premium 12V 120Ah Leisure Battery from the Lucas Premium leisure battery range.\u003c\/p\u003e\u003cp\u003eDesigned for caravans, motorhomes, campervans, boats and compatible leisure applications. Please compare the specifications below with your existing battery before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LL35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 120Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking:\u003c\/strong\u003e 900 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 330 x 175 x 240 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal type:\u003c\/strong\u003e MARINE DT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase size:\u003c\/strong\u003e GR31\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 28 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help confirming compatibility? Contact our UK Lucas battery specialists before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54554202997078,"sku":"LL35","price":169.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/lucas-ll35mf-leisure-battery_pure-white.png?v=1786530748"},{"product_id":"lx24-lucas-premium-12v-80ah-leisure-battery","title":"LX24 Lucas Premium 12V 80Ah Leisure Battery","description":"\u003cp\u003eLX24 Lucas Premium 12V 80Ah Leisure Battery from the Lucas Premium leisure battery range.\u003c\/p\u003e\u003cp\u003eDesigned for caravans, motorhomes, campervans, boats and compatible leisure applications. Please compare the specifications below with your existing battery before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LX24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 80Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking:\u003c\/strong\u003e 600 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 257 x 172 x 220 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal type:\u003c\/strong\u003e MARINE DT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase size:\u003c\/strong\u003e GR24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 18 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help confirming compatibility? Contact our UK Lucas battery specialists before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54554211516758,"sku":"LX24","price":99.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/lucas-lx24-mf-leisure-battery-2_pure-white.png?v=1786530712"},{"product_id":"lx27-lucas-premium-12v-95ah-leisure-battery","title":"LX27 Lucas Premium 12V 95Ah Leisure Battery","description":"\u003cp\u003eLX27 Lucas Premium 12V 95Ah Leisure Battery from the Lucas Premium leisure battery range.\u003c\/p\u003e\u003cp\u003eDesigned for caravans, motorhomes, campervans, boats and compatible leisure applications. Please compare the specifications below with your existing battery before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LX27\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 95Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking:\u003c\/strong\u003e 690 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 302 x 172 x 220 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal type:\u003c\/strong\u003e MARINE DT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase size:\u003c\/strong\u003e GR27\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20.8 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help confirming compatibility? Contact our UK Lucas battery specialists before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54554212565334,"sku":"LX27","price":119.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/lucas-lx27mf-leisure-battery_pure-white.png?v=1786530689"},{"product_id":"lx31-lucas-premium-12v-105ah-leisure-battery","title":"LX31 Lucas Premium 12V 105Ah Leisure Battery","description":"\u003cp\u003eLX31 Lucas Premium 12V 105Ah Leisure Battery from the Lucas Premium leisure battery range.\u003c\/p\u003e\u003cp\u003eDesigned for caravans, motorhomes, campervans, boats and compatible leisure applications. Please compare the specifications below with your existing battery before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LX31\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 105Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold cranking:\u003c\/strong\u003e 740 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 330 x 172 x 242 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal type:\u003c\/strong\u003e MARINE DT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase size:\u003c\/strong\u003e GR31\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 23.2 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help confirming compatibility? Contact our UK Lucas battery specialists before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54554212794710,"sku":"LX31","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/lucas-lx31mf-leisure-battery_pure-white.png?v=1786530663"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/collections\/marine-batteries.png?v=1785238587","url":"https:\/\/lucasbatteries.co.uk\/collections\/marine-batteries.oembed","provider":"Lucas Battery Specialists UK","version":"1.0","type":"link"}