When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
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1 x Step-Up Module Converter Adapter Cable. Input Interface: USB A Type Male. Cable Length: approx. Output Interface:5.5 x2.1mm/3.5x1.35mm/4.0x1.7mm. Long service life. Easy to use. Size: as shown in picture.
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[AC/DC Power Adapter] Input: AC 100-240v 50 60hz. Max current: 2A (compatible with 200mA / 300mA / 500mA / 600mA / 800mA / 1000mA ). Why is 30W ?. Adapter is 24W max + USB 6W. When using USB alone, it is 5V 2.1A max.
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Fit for car, truck, motorcycle, scooter, lawn mower, boat, RV, SUV, ATV and more. Pulse repair function can help to repair your loss battery and extend battery life. Multiple protection protects against reverse polarity, sparks, overcharging, over-current, open-circuits, short-circuits, and overheating.
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When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
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Input: 12-24V.
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【Fit All types of Battery】 -- Fit for Lithium Battery, Lead-acid Battery, AGM Battery etc. 【Delay Setting Function】 —— The new delay function avoids frequent switching on and off of the isolator due to unstable current, which prolongs the isolator and battery life.
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When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay