{"product_id":"obd-ecu-nodkraftforsorjning-batteriklamma","title":"OBD2 Memory Saver – ECU emergency power supply for battery replacement","description":"\u003cdiv class=\"product-page\"\u003e\n\u003ch2\u003eJFIND JC02 OBD2 Memory Saver – ECU Emergency Power for Battery Replacement (3m Cable, 8A Fuse, Gold-Plated Clamps)\u003c\/h2\u003e\n\u003c!-- SHORT VERSION 200–300 WORDS --\u003e\n\u003csection id=\"kortversion\"\u003e\n\u003ch2\u003eShort Version\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eJFIND JC02\u003c\/strong\u003e is a smart \u003cstrong\u003eOBD2 Memory Saver\u003c\/strong\u003e (battery replacement assistant) that provides the car with an alternative \u003cstrong\u003e12V power supply via the OBD2 port\u003c\/strong\u003e when changing the car battery. The purpose is to \u003cstrong\u003epreserve the car's memories\u003c\/strong\u003e such as fault codes, ECU adaptations, and electronic settings (e.g., stereo\/radio presets), so you avoid unnecessary resets after a battery change. In modern cars, power outages can otherwise cause settings to revert to default, and in some cases, you may need to enter a security code for the stereo.\u003c\/p\u003e\n\u003cp\u003eThe JC02 can be powered by \u003cstrong\u003eany 12V DC source\u003c\/strong\u003e, such as a \u003cstrong\u003ejump starter outlet\u003c\/strong\u003e, a separate \u003cstrong\u003e12V lead-acid battery\u003c\/strong\u003e, or \u003cstrong\u003eanother car's 12V outlet (cigarette lighter socket)\u003c\/strong\u003e. The major advantage is the extra-long cable of \u003cstrong\u003e10 ft \/ approx. 3 meters\u003c\/strong\u003e, which makes it easier to draw power from another vehicle if you don't have a booster readily available. The product also highlights \u003cstrong\u003egold-plated alligator clips\u003c\/strong\u003e (better contact compared to standard zinc-plated clamps) and a \u003cstrong\u003ebuilt-in 8A fuse\u003c\/strong\u003e for overload protection.\u003c\/p\u003e\n\u003cp\u003eImportant: During battery replacement, you should \u003cstrong\u003enot turn on the ignition\u003c\/strong\u003e or turn the key to \u003cstrong\u003eACC\u003c\/strong\u003e when the battery is disconnected – otherwise, the fuse in the memory saver may blow.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e JFIND JC02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e OBD2 ECU Emergency Power \/ Memory Saver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e 300 + 40 cm (total as per spec)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e 8A fuse built-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e 12V DC (jump starter, 12V battery, or another vehicle)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003cnav id=\"toc\" aria-label=\"Table of Contents\"\u003e\n\u003ch2\u003eContents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"#vad-ar\"\u003eWhat is an OBD2 Memory Saver?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#varfor\"\u003eWhy is it needed in modern cars?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#fordelar\"\u003eAdvantages of JFIND JC02\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#kompatibilitet\"\u003eCompatibility \u0026amp; Requirements\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#stegforsteg\"\u003eStep-by-step: how to use JC02 for battery replacement\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#scenarier\"\u003eThree common scenarios for power supply\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#felsokning\"\u003eTroubleshooting\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#sakerhet\"\u003eImportant Warnings \u0026amp; Safety\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#spec\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#forpackning\"\u003ePackage Contents\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#faq\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#sammanfattning\"\u003eSummary\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#head\"\u003eHead-tags (optional copy\/paste)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/nav\u003e\u003chr\u003e\n\u003cp class=\"breadcrumbs\" style=\"margin: 0 0 10px 0;\"\u003e\u003ca href=\"\/en-en\"\u003eHome\u003c\/a\u003e  \/  \u003ca href=\"\/en-en\/collections\/obd2-tillbehor\"\u003eOBD2 Accessories\u003c\/a\u003e  \/  \u003ca href=\"\/en-en\/collections\/verktyg\"\u003eTools\u003c\/a\u003e  \/  \u003cspan aria-current=\"page\"\u003eJFIND JC02 Memory Saver\u003c\/span\u003e\u003c\/p\u003e\n\u003csection id=\"vad-ar\"\u003e\n\u003ch2\u003eWhat is an OBD2 Memory Saver?\u003c\/h2\u003e\n\u003cp\u003eAn \u003cstrong\u003eOBD2 Memory Saver\u003c\/strong\u003e is a device that provides the car with \u003cstrong\u003eexternal 12V power\u003c\/strong\u003e via the OBD2 socket when disconnecting the car's main battery. This way, the car's control units and memories can remain powered during the actual battery replacement.\u003c\/p\u003e\n\u003cp\u003eThe JFIND JC02 acts as an \u003cstrong\u003einterface connection\u003c\/strong\u003e between a 12V DC source and the car's OBD2 port and is designed to preserve “vehicle codes and electronic presets” according to the product text.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"varfor\"\u003e\n\u003ch2\u003eWhy is it needed in modern cars?\u003c\/h2\u003e\n\u003cp\u003eIn older cars, you could often change the battery without noticing anything. In newer cars, electronics control much more: everything from stereo and comfort functions to transmission adaptation values. If the power is interrupted, settings can be reset, and the car may feel different until it has \"relearned.\" In some cases, a security code may also be needed for the stereo after a battery change.\u003c\/p\u003e\n\u003cp\u003eWith a memory saver, you reduce the risk of having to reset settings or deal with \"unnecessary\" consequences of a power outage.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"fordelar\"\u003e\n\u003ch2\u003eAdvantages of JFIND JC02\u003c\/h2\u003e\n\u003ch3\u003e1) Gold-plated clamps\u003c\/h3\u003e\n\u003cp\u003eJFIND states that their alligator clips are \u003cstrong\u003egold-plated\u003c\/strong\u003e instead of zinc-plated, which can provide better contact and power transfer.\u003c\/p\u003e\n\u003ch3\u003e2) Extra-long cable – approx. 3 meters\u003c\/h3\u003e\n\u003cp\u003eMany memory savers have a 1–3 ft cable. The JC02 has, according to the text, \u003cstrong\u003e10 ft \/ approx. 3 meters\u003c\/strong\u003e, which makes it easier to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ereach a jump starter located a bit away\u003c\/li\u003e\n\u003cli\u003edraw 12V from another car's cigarette lighter socket if you lack a booster\u003c\/li\u003e\n\u003cli\u003ework more comfortably around the engine compartment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e3) Built-in 8A fuse\u003c\/h3\u003e\n\u003cp\u003eA built-in \u003cstrong\u003e8 amp fuse\u003c\/strong\u003e provides overload protection. If something goes wrong (e.g., the ignition is turned on during battery replacement), the fuse can blow instead of you risking bigger problems.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"kompatibilitet\"\u003e\n\u003ch2\u003eCompatibility \u0026amp; Requirements\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicles:\u003c\/strong\u003e cars with \u003cstrong\u003e16-pin OBD2\u003c\/strong\u003e (standard OBD2 socket)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e \u003cstrong\u003e12V DC\u003c\/strong\u003e (jump starter, 12V lead-acid battery, or another car's 12V outlet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e The OBD2 port must have stable contact – otherwise, memory can still be lost during replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"padding: 12px; border: 1px solid #e5e5e5; border-radius: 10px;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Not all cars power the OBD2 port in exactly the same way, and some vehicles may have specific requirements. The JC02 is designed for general OBD2 memory saving, but always follow the car's own instructions for battery replacement.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"stegforsteg\"\u003e\n\u003ch2\u003eStep-by-step: how to use JFIND JC02 for battery replacement\u003c\/h2\u003e\n\u003ch3\u003ePreparations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePark safely, turn off the car, and remove the key.\u003c\/li\u003e\n\u003cli\u003eTurn off all power consumers (lights, fan, stereo).\u003c\/li\u003e\n\u003cli\u003eRead the car's recommended procedure for battery replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e1) Connect external 12V source to JC02\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSelect power source: jump starter, 12V battery, or another car's 12V outlet.\u003c\/li\u003e\n\u003cli\u003eConnect the JC02 correctly to the power source (correct polarity).\u003c\/li\u003e\n\u003cli\u003eCheck that the \u003cstrong\u003ered LED\u003c\/strong\u003e on the 12V plug lights up (according to product text: otherwise, no power or wrong polarity).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003e2) Connect the OBD2 connector to the car\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInsert the JC02's \u003cstrong\u003eOBD2 connector\u003c\/strong\u003e into the car's OBD2 port.\u003c\/li\u003e\n\u003cli\u003eEnsure the connector is firmly seated – poor contact can cause the ECU to lose voltage during replacement.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003e3) Insulate battery cables\u003c\/h3\u003e\n\u003cp\u003eSince the car's electrical system is now powered via the OBD2 memory saver, the battery cables are electrically \"live.\" Cover the battery cables with insulating material so that they cannot touch metal or each other.\u003c\/p\u003e\n\u003ch3\u003e4) Replace battery\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the old battery (usually negative first, follow the car's instructions).\u003c\/li\u003e\n\u003cli\u003eReplace with a new battery.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery (often positive first, follow the car's instructions).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo not turn on the ignition\u003c\/strong\u003e and do not turn to \u003cstrong\u003eACC\u003c\/strong\u003e during the actual replacement.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003e5) Disconnect JC02\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eOnce the new battery is in place and properly connected: unplug the JC02 from the OBD2 port.\u003c\/li\u003e\n\u003cli\u003eDisconnect the JC02 from the power source.\u003c\/li\u003e\n\u003cli\u003eWipe the cable and connectors with a dry cloth after use (according to product text).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"scenarier\"\u003e\n\u003ch2\u003eThree common scenarios for power supply\u003c\/h2\u003e\n\u003ch3\u003eScenario A: Jump starter with 12V outlet\u003c\/h3\u003e\n\u003cp\u003eConnect the jump starter to the JC02's 12V input, and then the OBD2 connector to the car. This is often the smoothest setup.\u003c\/p\u003e\n\u003ch3\u003eScenario B: Separate 12V lead-acid battery\u003c\/h3\u003e\n\u003cp\u003eConnect the alligator clips to a healthy 12V lead-acid battery (correct polarity), check the LED, and then connect the OBD2 connector to the car.\u003c\/p\u003e\n\u003ch3\u003eScenario C: Draw 12V from another car's cigarette lighter socket\u003c\/h3\u003e\n\u003cp\u003eThanks to the 3-meter cable, you can draw power from another vehicle if you lack a booster. Insert the cigarette lighter plug into the \"healthy\" car and the OBD2 connector into the car where you are replacing the battery. Check the LED and that the socket is working.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"felsokning\"\u003e\n\u003ch2\u003eTroubleshooting\u003c\/h2\u003e\n\u003ch3\u003eRed LED does not light up\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCheck that the power source provides 12V.\u003c\/li\u003e\n\u003cli\u003eCheck polarity (wrong polarity = no LED according to product text).\u003c\/li\u003e\n\u003cli\u003eIf drawing power from another car: check that the cigarette lighter socket is working and providing voltage.\u003c\/li\u003e\n\u003cli\u003eIf using a jump starter: check connection and that the 12V outlet is active.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCar still lost memory\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCheck that the OBD2 connector was properly seated the entire time (poor contact can cause voltage loss).\u003c\/li\u003e\n\u003cli\u003eCheck that the power source did not go to sleep\/off during replacement.\u003c\/li\u003e\n\u003cli\u003eCheck that you did not turn on ignition\/ACC during replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFuse has blown (8A)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis can happen if the ignition\/ACC is turned on during battery replacement (according to product warning).\u003c\/li\u003e\n\u003cli\u003eCheck the fuse in the 12V plug and replace\/rectify according to your supplier's instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"sakerhet\"\u003e\n\u003ch2\u003eImportant Warnings \u0026amp; Safety (summary of product warnings)\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eRead the car and battery manufacturer's safety instructions before changing the battery.\u003c\/li\u003e\n\u003cli\u003eWhen the memory saver powers the car via OBD: the battery cables are electrically live – insulate them to avoid short circuits.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDo not\u003c\/strong\u003e turn on the ignition and \u003cstrong\u003edo not\u003c\/strong\u003e turn to ACC when the battery is disconnected and the replacement is not complete.\u003c\/li\u003e\n\u003cli\u003eEnsure good contact in the OBD2 port – otherwise, the ECU may lose power during replacement.\u003c\/li\u003e\n\u003cli\u003eCheck that the 12V plug is correctly connected and that the LED indicates power.\u003c\/li\u003e\n\u003cli\u003eIf problems occur: check the fuse or contact the seller\/distributor (according to product text).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"spec\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eItem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eBattery Replacement Assistant (OBD2 Memory Saver)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eJFIND\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eJC02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003ePlastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e300 + 40 cm total (as per spec)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eFuse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e8A built-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"forpackning\"\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × JFIND JC02 OBD2 Memory Saver \/ Battery Replacement Assistant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"faq\"\u003e\n\u003ch2\u003eFAQ – Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003e1) What does a memory saver save?\u003c\/h3\u003e\n\u003cp\u003eIt is designed to preserve the car's codes and electronic settings\/presets when the main battery is disconnected.\u003c\/p\u003e\n\u003ch3\u003e2) Does it work on all cars?\u003c\/h3\u003e\n\u003cp\u003eIt is designed for cars with 16-pin OBD2 and 12V systems. Always follow the car's instructions for battery replacement.\u003c\/p\u003e\n\u003ch3\u003e3) Can I use another 12V battery as a power source?\u003c\/h3\u003e\n\u003cp\u003eYes, the product states that it can be powered by a jump starter, 12V lead-acid battery, or another car's 12V outlet.\u003c\/p\u003e\n\u003ch3\u003e4) Why is the cable so long?\u003c\/h3\u003e\n\u003cp\u003eThe extra length (approx. 3 meters) allows you to draw power from another car if you lack a booster, according to the product text.\u003c\/p\u003e\n\u003ch3\u003e5) What happens if I turn on the ignition during battery replacement?\u003c\/h3\u003e\n\u003cp\u003eAccording to the warning, it can cause high current\/overload and blow the fuse in the memory saver.\u003c\/p\u003e\n\u003ch3\u003e6) What does the red LED on the 12V plug mean?\u003c\/h3\u003e\n\u003cp\u003eAccording to the product text, it indicates correct power\/polarity. If it doesn't light up, there's no power or the polarity is wrong.\u003c\/p\u003e\n\u003ch3\u003e7) Does it have overload protection?\u003c\/h3\u003e\n\u003cp\u003eYes, an 8A fuse is built into the memory saver.\u003c\/p\u003e\n\u003ch3\u003e8) Can it prevent the stereo from needing a code?\u003c\/h3\u003e\n\u003cp\u003eYes, that's one of the points: to avoid settings being reset, which on some cars can trigger the need for a code.\u003c\/p\u003e\n\u003ch3\u003e9) Does the OBD2 connector need to be seated very firmly?\u003c\/h3\u003e\n\u003cp\u003eYes, according to the product warning, the connector must be securely seated to avoid losing power to the ECU during battery replacement.\u003c\/p\u003e\n\u003ch3\u003e10) Can I leave it connected after battery replacement?\u003c\/h3\u003e\n\u003cp\u003eNo, unplug after use and wipe contacts\/cable according to the product text.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003csection id=\"sammanfattning\"\u003e\n\u003ch2\u003eSummary\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eJFIND JC02\u003c\/strong\u003e is a practical \u003cstrong\u003eOBD2 memory saver\u003c\/strong\u003e that helps you preserve your car's settings and ECU memory during battery replacement. With \u003cstrong\u003egold-plated clamps\u003c\/strong\u003e, an \u003cstrong\u003eextra-long 3m cable\u003c\/strong\u003e, and an \u003cstrong\u003e8A fuse\u003c\/strong\u003e, you get a robust solution that works with multiple 12V power sources – jump starter, external 12V battery, or another car's 12V outlet.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003chr\u003e\n\u003c\/div\u003e","brand":"Felkodsläsare","offers":[{"title":"Default Title","offer_id":54177163706636,"sku":"FEL-J0002","price":13.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/4979\/6876\/files\/Hca3ded653ed94416be0e97bf19164463b.jpg?v=1774075501","url":"https:\/\/www.felkodslasare.se\/en-en\/products\/obd-ecu-nodkraftforsorjning-batteriklamma","provider":"Felkodsläsare","version":"1.0","type":"link"}