{"title":"Start Stop EFB Batteries","description":"\u003cp\u003eLucas Start Stop EFB batteries are built for compatible cars that require more cycling durability than a conventional starter battery can provide. EFB stands for Enhanced Flooded Battery: it remains a flooded lead-acid design, but its internal construction is strengthened for repeated engine stops, restarts and the changing state of charge found in many Start Stop vehicles.\u003c\/p\u003e\n\n\u003cp\u003eThe correct EFB battery is determined by the exact vehicle, not by the Start Stop button alone. Begin with the registration or full vehicle details, then confirm the technology and specification printed on the existing battery. A replacement must suit the vehicle’s charging strategy as well as its battery tray, terminals and starting requirements.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is an EFB car battery?\u003c\/h3\u003e\n\n\u003cp\u003eAn Enhanced Flooded Battery is an improved form of the familiar flooded starter battery. Enhancements to the plate construction and active-material retention help it withstand more frequent charging and discharging than a standard battery. This makes EFB suitable for many entry-level and intermediate Start Stop systems and other vehicle applications specifically designed around EFB technology.\u003c\/p\u003e\n\n\u003cp\u003eEFB should not be confused with AGM. AGM holds its electrolyte within absorbent glass mats and is commonly used in more demanding energy-management systems. Both technologies can appear in cars with automatic engine stop, so the presence of Start Stop does not identify which one the vehicle needs.\u003c\/p\u003e\n\n\u003ch3\u003eReplace an original EFB with the correct EFB\u003c\/h3\u003e\n\n\u003cp\u003eIf the vehicle was factory-fitted with EFB, use an approved EFB replacement unless the vehicle application specifically permits an AGM upgrade. Do not downgrade to a conventional flooded car battery simply because it has similar dimensions, Ah or CCA.\u003c\/p\u003e\n\n\u003cp\u003eA standard battery is not engineered for the same repeated cycling. It may deteriorate prematurely and can cause the Start Stop or energy-management system to restrict operation. Keeping the correct technology is part of the fitment, just like matching the terminal layout or battery size.\u003c\/p\u003e\n\n\u003ch3\u003eCan an EFB battery be upgraded to AGM?\u003c\/h3\u003e\n\n\u003cp\u003eSome EFB-equipped vehicles can use a suitable AGM battery as an upgrade, but this should never be treated as a universal substitution. The AGM product must be approved for the exact vehicle, fit the installation correctly and meet the required performance class.\u003c\/p\u003e\n\n\u003cp\u003eWhere the car uses battery energy management, changing from EFB to AGM may also require the new technology and capacity to be configured in the vehicle. Check the manufacturer procedure or fitment data before ordering. An AGM-to-EFB change is a downgrade and must not be made where AGM was originally specified.\u003c\/p\u003e\n\n\u003cp\u003eIf your vehicle finder result requires AGM, use our \u003ca href=\"\/collections\/start-stop-agm-batteries\"\u003eStart Stop AGM car batteries\u003c\/a\u003e collection rather than choosing an EFB battery from this page.\u003c\/p\u003e\n\n\u003ch3\u003eConfirm that the original battery really is EFB\u003c\/h3\u003e\n\n\u003cp\u003eLook for “EFB” or “Enhanced Flooded Battery” on the existing label. Do not identify the technology from label colour, case colour or the presence of removable-looking plugs. Replacement batteries from different manufacturers can use very different artwork and case designs.\u003c\/p\u003e\n\n\u003cp\u003eIf the label is hidden or damaged, use the vehicle registration and provide the complete battery reference to us. Where possible, photograph the battery before removing covers so the original terminal position, venting, cable route and retaining arrangement are recorded.\u003c\/p\u003e\n\n\u003ch3\u003eMatch more than the Ah rating\u003c\/h3\u003e\n\n\u003cp\u003eThe Ah figure is only one part of the specification. Compare every important detail before selecting a Lucas EFB battery:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVehicle application:\u003c\/strong\u003e confirm the exact make, model, production period, engine and fuel type.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTechnology:\u003c\/strong\u003e use EFB where the fitment calls for EFB.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e confirm the nominal battery voltage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e match the approved Ah performance class.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStarting output:\u003c\/strong\u003e meet the required CCA using the same test standard.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e check length, width and total height to the top of the terminals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e verify positive-terminal position, post type and cable reach.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHold-down:\u003c\/strong\u003e make sure the original clamp can secure the battery correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eA higher Ah number does not make a battery an automatic upgrade. Increasing capacity can also mean a longer or taller case, and the vehicle’s energy-management system may be configured for a particular nominal value.\u003c\/p\u003e\n\n\u003ch3\u003eWhy case height matters on popular EFB batteries\u003c\/h3\u003e\n\n\u003cp\u003eCommon European battery families can share a similar length and width while differing in height. Lower-profile and full-height batteries may look almost identical in a product photograph, but the taller option can foul a bonnet, seat base, floor panel or protective cover.\u003c\/p\u003e\n\n\u003cp\u003eOther EFB batteries use taller, narrower case formats found in selected Japanese and Korean vehicle applications. Never use the photograph or Ah rating to judge fit. Compare the published dimensions, base fixing and terminals with both the vehicle data and the battery being removed.\u003c\/p\u003e\n\n\u003ch3\u003eBattery registration and reset requirements\u003c\/h3\u003e\n\n\u003cp\u003eMany Start Stop cars monitor battery condition through an energy-management system. After replacement, the vehicle may require battery registration, a battery-monitor reset, diagnostic adaptation or a manufacturer-specific learning period. Requirements differ between makes, models and production years.\u003c\/p\u003e\n\n\u003cp\u003eThe procedure can tell the vehicle that a new battery has been fitted and may include its technology and nominal capacity. Check what is required before disconnecting the old battery. If diagnostic equipment or a controlled support-voltage procedure is specified, use a suitably equipped technician rather than guessing from another model’s instructions.\u003c\/p\u003e\n\n\u003ch3\u003eDo not bypass the battery monitoring sensor\u003c\/h3\u003e\n\n\u003cp\u003eA monitoring sensor is often incorporated into the negative terminal or earth cable. It allows the vehicle to calculate current flow and battery condition. Refit the original sensor and terminal assembly exactly as intended, and use the approved charging and accessory connection points.\u003c\/p\u003e\n\n\u003cp\u003eConnecting equipment in a way that bypasses the sensor can prevent some electrical activity from being measured. If the sensor, earth lead or terminal is loose, corroded or damaged, it should be inspected as part of the diagnosis rather than transferred blindly to the new battery.\u003c\/p\u003e\n\n\u003ch3\u003eA disabled Start Stop function is not a battery test\u003c\/h3\u003e\n\n\u003cp\u003eAutomatic engine stop may be unavailable because of battery state of charge, low or high temperature, heating and air-conditioning demand, windscreen demisting, steering activity, engine temperature or numerous other operating conditions. A stored vehicle fault can also inhibit the system.\u003c\/p\u003e\n\n\u003cp\u003eDo not assume that the EFB battery has failed solely because the engine keeps running at traffic lights. Read the owner’s manual, check for warning messages and test the battery and charging system. Diagnosis is particularly important if the battery has recently been replaced or repeatedly becomes discharged.\u003c\/p\u003e\n\n\u003ch3\u003eTest before replacing\u003c\/h3\u003e\n\n\u003cp\u003eA proper assessment should consider battery age, state of charge, starting performance and the complete charging system. Loose terminals, high-resistance connections, excessive key-off drain or a charging-control fault can create symptoms similar to a worn battery.\u003c\/p\u003e\n\n\u003cp\u003eUse a tester with the correct EFB setting and enter the specification from the battery label. A single resting-voltage reading cannot measure every aspect of battery health. If the battery is simply undercharged, establish why before deciding that replacement alone will solve the problem.\u003c\/p\u003e\n\n\u003ch3\u003eShort journeys and EFB charging\u003c\/h3\u003e\n\n\u003cp\u003eRepeated short trips can consume more energy through starting and electrical loads than the journey returns to the battery. Security systems and connected vehicle features may continue to use a small amount of power while the car is parked. Over time, even a serviceable EFB battery can become undercharged.\u003c\/p\u003e\n\n\u003cp\u003eWhen charging is appropriate, use a quality smart charger with a setting approved for 12V EFB or flooded automotive batteries and follow the vehicle instructions. Connect to the specified charging points, particularly when a battery sensor is fitted. Do not use uncontrolled high-voltage or boost modes on a connected modern vehicle.\u003c\/p\u003e\n\n\u003ch3\u003ePrepare for the actual battery location\u003c\/h3\u003e\n\n\u003cp\u003eThe battery may be under the bonnet, beneath a seat, in the boot or below a floor panel. The location can affect access, lifting space, vent connections and the correct disconnection procedure. Record how covers, insulation, vent tubes and retaining parts are fitted before removal.\u003c\/p\u003e\n\n\u003cp\u003eAlways secure the replacement with the approved hold-down. A battery that can move may damage its case, terminals or cables. Never force a larger battery into the space or omit the retaining clamp because a higher-capacity product appears more attractive.\u003c\/p\u003e\n\n\u003ch3\u003eSafe handling and responsible recycling\u003c\/h3\u003e\n\n\u003cp\u003eEFB remains a lead-acid battery. Keep it upright, remove metal jewellery, avoid terminal short circuits and follow the vehicle manufacturer’s disconnection and reconnection sequence. Do not install or charge a battery that is cracked, leaking, swollen, frozen or unusually hot.\u003c\/p\u003e\n\n\u003cp\u003eAn old car battery must not be placed in household waste. Protect its terminals, transport it upright and return it through an appropriate battery-recycling route.\u003c\/p\u003e\n\n\u003ch3\u003eFind the correct Lucas EFB battery\u003c\/h3\u003e\n\n\u003cp\u003eLucas references such as LE027, LE096, LE100, LE110, LE115 and LE005 cover different case formats and performance levels. They are not interchangeable choices based simply on price or Ah. Use the finder result and the existing battery specification to identify the correct product.\u003c\/p\u003e\n\n\u003cp\u003eIf you need help, send us the vehicle registration and clear photographs of the battery label, terminals, hold-down and complete installation area. Mention any Start Stop or battery warning, whether the battery appears to be original and whether the car has recently had diagnostic or charging work. We can help compare the appropriate Lucas EFB fitment and flag common reset or registration considerations.\u003c\/p\u003e","products":[{"product_id":"lucas-efb-le027-car-battery","title":"Lucas EFB LE027 12V 60Ah Start Stop Car Battery","description":"\u003cp\u003eLucas EFB LE027 Car Battery from the Lucas EFB range.\u003c\/p\u003e\n\u003cp\u003ePlease check the specifications below to confirm this battery matches your existing battery or vehicle requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LE027\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK part number:\u003c\/strong\u003e 027EFB\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 60Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCCA:\u003c\/strong\u003e 640 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 243 x 175 x 190 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 17.7 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNeed help choosing the correct battery? Contact our UK battery specialists for support before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54457604571478,"sku":"LE027","price":119.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/le027_2f2ba6ad-b40a-4a61-976b-db292bd50ce6.jpg?v=1783513441"},{"product_id":"lucas-efb-le068-car-battery","title":"Lucas EFB LE068 12V 68Ah Start Stop Car Battery","description":"\u003cp\u003eLucas EFB LE068 Car Battery from the Lucas EFB range.\u003c\/p\u003e\u003cp\u003ePlease check the specifications below to confirm this battery matches your existing battery or vehicle requirements.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LE068\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK part number:\u003c\/strong\u003e 068EFB\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 68Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCCA:\u003c\/strong\u003e 670 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 257 x 175 x 220 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 19.2 kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNeed help choosing the correct battery? Contact our UK battery specialists for support before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54457610436950,"sku":"LE068","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/le068.jpg?v=1783513427"},{"product_id":"lucas-efb-le096-car-battery","title":"Lucas EFB LE096 12V 70Ah Start Stop Car Battery","description":"\u003cp\u003eLucas EFB LE096 Car Battery from the Lucas EFB range.\u003c\/p\u003e\n\u003cp\u003ePlease check the specifications below to confirm this battery matches your existing battery or vehicle requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LE096\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK part number:\u003c\/strong\u003e 096EFB\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 70Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCCA:\u003c\/strong\u003e 720 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 278 x 174 x 190 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 18.9 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNeed help choosing the correct battery? Contact our UK battery specialists for support before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54457612501334,"sku":"LE096","price":139.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/le096.webp?v=1783513327"},{"product_id":"lucas-efb-le100-car-battery","title":"Lucas EFB LE100 12V 65Ah Start Stop Car Battery","description":"\u003cp\u003eLucas EFB LE100 Car Battery from the Lucas EFB range.\u003c\/p\u003e\n\u003cp\u003ePlease check the specifications below to confirm this battery matches your existing battery or vehicle requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LE100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK part number:\u003c\/strong\u003e 100EFB\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 65Ah\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCCA:\u003c\/strong\u003e 650 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 278 x 175 x 175 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 16.9 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNeed help choosing the correct battery? Contact our UK battery specialists for support before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54457617383766,"sku":"LE100","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/le100.jpg?v=1783513316"},{"product_id":"lucas-efb-le110-car-battery","title":"Lucas EFB LE110 12V 75Ah Start Stop Car Battery","description":"\u003cp\u003eLucas EFB LE110 Car Battery from the Lucas EFB range.\u003c\/p\u003e\n\u003cp\u003ePlease check the specifications below to confirm this battery matches your existing battery or vehicle requirements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e LE110\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK part number:\u003c\/strong\u003e 110EFB\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\u003eCCA:\u003c\/strong\u003e 730 EN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 315 x 175 x 175 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal layout:\u003c\/strong\u003e 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHold down:\u003c\/strong\u003e B13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 19.6 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNeed help choosing the correct battery? Contact our UK battery specialists for support before ordering.\u003c\/p\u003e","brand":"Lucas","offers":[{"title":"Default Title","offer_id":54457625477462,"sku":"LE110","price":139.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/files\/le110_b4cdcb90-feab-404f-8aff-30a5a0ea55c1.jpg?v=1783513220"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1037\/5033\/6854\/collections\/efb-start-stop-batteries.png?v=1785238366","url":"https:\/\/lucasbatteries.co.uk\/collections\/start-stop-efb-batteries.oembed","provider":"Lucas Battery Specialists UK","version":"1.0","type":"link"}