AUTOOL BT30 ECU Emergency Power Supply Cable Includes 3A Fuse

AUTOOL BT30Product OverviewThe AUTOOL BT30 ECU Emergency Power Supply Cable is an OBD emergency power cable designed to keep the vehicle ECU and electronic systems powered during battery replacement. It helps prevent data loss, reset issues, and electronic setting loss while allowing users to observe real-time voltage and current changes through the built-in high-definition digital display. ECU Power Supply Voltage Display Current Display 3A Fuse10-14VOperating Voltage<7AOperating Current-20°C~60°COperating Temp3 YearsWarranty Click to enlargeKey FeaturesKey FeaturesBT30 combines OBD emergency power support, voltage and current display, leakage detection assistance, insulated clamps, and fuse protection for safer battery replacement and electrical observation.ECU Emergency Power SupplyDuring vehicle battery replacement, BT30 supplies backup power through the OBD interface to help keep the ECU and vehicle electronic systems powered.Voltage And Current DisplayThe high-definition digital display makes it easier to observe voltage and current changes while the device is operating.Leakage Detection SupportAfter connecting an external 12V battery and disconnecting the original vehicle battery negative terminal, the current display can help observe vehicle static current and possible leakage current.Built-In 3A Fuse ProtectionThe built-in 3A fuse helps prevent damage to the device and vehicle ECU when abnormal current passes through the circuit.Multiple Electrical ProtectionsBT30 supports overcurrent protection, overvoltage protection, and reverse polarity protection to reduce risks caused by circuit faults or incorrect connection.Insulated Clamp And CableThe insulated cable, fully enclosed clamp design, pure copper clamp teeth, and thickened spring improve grip stability and safer handling. Click to enlarge Click to enlarge Click to enlargeSpecificationsSpecificationsReview the BT30 operating voltage, operating current, temperature range, interface, fuse, cable length, and structure before use.Product InformationProductAUTOOL BT30 ECU Emergency Power Supply CableProduct TypeOBD emergency power cable for battery replacement and leakage detection supportMain FunctionMaintains ECU and vehicle electronic system power during battery replacementDisplayVoltage display and current displayElectrical ParametersOperating Voltage10-14VOperating Current<7AFuseBuilt-in 3A fuseReplacement Fuse3A or 5A fuse only; do not use a fuse larger than 5AOperating Temperature-20°C~60°CStructureInterfaceOBD interfaceClampPower clamp with insulated cablePower SwitchBuilt-in ON / OFF switchCable Length0.5m clamp side 0.4m OBD sideMain Unit Size Reference102mm height / 48mm width shown in the specification image Click to enlarge Product InformationProductAUTOOL BT30 ECU Emergency Power Supply CableProduct TypeOBD emergency power cable for battery replacement and leakage detection supportMain FunctionMaintains ECU and vehicle electronic system power during battery replacementDisplayVoltage display and current display Electrical ParametersOperating Voltage10-14VOperating Current<7AFuseBuilt-in 3A fuseReplacement Fuse3A or 5A fuse only; do not use a fuse larger than 5AOperating Temperature-20°C~60°C StructureInterfaceOBD interfaceClampPower clamp with insulated cablePower SwitchBuilt-in ON / OFF switchCable Length0.5m clamp side 0.4m OBD sideMain Unit Size Reference102mm height / 48mm width shown in the specification image Click to enlargeHow To UseHow To UseUse a fully charged 12V spare battery and connect BT30 correctly before removing the original vehicle battery. Keep the vehicle power switch OFF during the operation.Prepare A Fully-Charged 12V Spare BatteryPrepare a fully charged 12V battery before replacing the vehicle battery. Do not use a low-voltage battery as the backup power source.Connect The Power ClampConnect the red clamp to the positive terminal and the black clamp to the negative terminal. After correct connection, the screen displays voltage data.Connect The OBD InterfaceConnect the BT30 OBD interface to the vehicle OBD port. After the OBD connection is successful, the screen can display current data under the correct test condition.Replace The Vehicle BatteryRemove the old battery and install the new battery while BT30 keeps power supplied through the OBD connection.Use NotesDuring battery replacement, keep the vehicle power switch OFF and avoid turning on electrical appliances.Before use, keep the car key at least 3 meters away from the vehicle to prevent wake-up current and high-current alarm.For current display / leakage detection, after connecting the external 12V battery, disconnect the negative terminal of the original vehicle battery.If the device alarms immediately, check whether the backup battery voltage is too low and replace it with a battery above 12V.Product ComparisonProduct ComparisonThe new BT30 improves the original ECU power supply function by adding display, leakage observation, electrical protection, and insulation upgrades.Old VersionBasic ECU power supply onlyNew VersionAdds leakage detection, voltage display, current display, overcurrent protection, overvoltage protection, reverse polarity protection, and insulation materialDecision CheckChoose the new BT30 if you need visible voltage/current monitoring, static current observation, and stronger circuit protection during battery replacement Click to enlarge Click to enlargeWhat Is In The BoxWhat Is In The BoxThe packing list uses one most relevant package image only, showing the BT30 product box, user manual, and main OBD emergency power cable.Main UnitAUTOOL BT30 OBD emergency power cableCable / ClampIntegrated power clamp and OBD interfaceDisplayVoltage and current digital displayProtectionBuilt-in 3A fuseDocumentationUser manualPackagingProduct box shown in the imageManual And DownloadsManual And DownloadsDownload the AUTOOL BT30 user manual for product overview, features, technical parameters, structure, battery replacement, leakage detection, maintenance, and warranty information. Click to enlargeAUTOOL BT30 User ManualOpen the PDF manual for BT30 OBD emergency power cable setup, battery replacement support, leakage detection, and fuse guidance. Download ManualNeed Setup Confirmation?Contact AUTOOL Store before use if you need to confirm battery replacement operation, current display conditions, fuse replacement, alarm troubleshooting, or no-power troubleshooting. Email[email protected] WhatsApp 86 189 2647 7404Before You Order And UseBefore You Order And UseReview the battery, sleep mode, key distance, current display, fuse replacement, and storage requirements before using BT30.Use And Safety NotesUse a fully charged 12V spare battery.Do not use a low-voltage battery; if the device alarms immediately, replace it with a battery above 12V.Do not use a jump starter or power bank charger as the power source; use a vehicle battery.During battery replacement, keep the vehicle power switch OFF and do not turn on electrical appliances.Keep the car key at least 3 meters away from the vehicle before use to prevent wake-up current and high-current alarm.For current display / leakage detection, disconnect the negative terminal of the original vehicle battery after connecting the external 12V battery.If the fuse blows, replace it with a 3A or 5A fuse only.Do not use a fuse larger than 5A; it may damage the vehicle fuse or computer motherboard.Store the product in a dry place and avoid hot, humid, or non-ventilated storage.Questions And AnswersThese answers cover fuse blowing, alarm triggers, no current display, fuse replacement, low battery voltage alarms, and no-power issues after connecting to a battery. Why Does The Alarm Trigger And Blow The Fuse During Use? Before use, make sure the vehicle is in sleep mode and keep the car key at least 3 meters away from the vehicle. This helps prevent the high-current alarm from being triggered. The fuse on BT30 will only blow when high current passes through the device. Why Is There No Current Display? After connecting an external 12V battery, disconnect the negative terminal of the original vehicle battery. This allows the load current to be displayed. What Should I Do If The Fuse Blows? Replace the fuse with a 3A or 5A fuse, which can usually be found at a repair shop. Do not use a fuse larger than 5A because an oversized fuse may damage the vehicle’s original fuse or the vehicle computer motherboard. Why Does The Device Beep As Soon As It Is Connected To The Vehicle Battery? The beeping alarm may occur because the battery voltage is too low. Replace the battery with one that has a voltage greater than 12V. Why Doesn’t The New Device Power On After Connecting To The Battery? Check whether the connected battery is a vehicle battery. If a jump starter or power bank charger is connected, the device will not power on. Replace it with a vehicle battery for proper power supply.Warranty And ContactWarranty And ContactFor product support, manual requests, battery replacement operation confirmation, leakage detection setup, current display troubleshooting, fuse replacement, alarm troubleshooting, or no-power troubleshooting, contact AUTOOL Store directly.Pre-Sales And Product SupportUse support if you need help confirming the correct 12V battery source, connection steps, current display condition, fuse size, alarm cause, no-power issue, or battery replacement workflow before using BT30.3-year warranty for eligible non-human damage casesLifetime maintenance supportManual request and setup confirmationFuse replacement and alarm troubleshootingNo current display and no power troubleshooting Email Support[email protected] WhatsApp Support 86 189 2647 7404