{"product_id":"dc-7-55v-battery-level-indicator-3s-14s-lithium-lead-acid","title":"DC 7-55V Battery Level Indicator – 3S-14S Lithium \u0026 Lead-Acid","description":"\u003cp\u003eKeep a precise eye on your battery's charge status with this compact, versatile \u003cstrong\u003eDC 7–55V Battery Level Indicator Board\u003c\/strong\u003e. Compatible with ternary lithium, lithium iron phosphate (LiFePO4), and lead-acid batteries across 3S–14S configurations, this LED indicator is an essential monitoring tool for electric vehicles, solar setups, DIY battery packs, and more. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Voltage Alert:\u003c\/strong\u003e A flashing red lightning symbol instantly signals when your battery is critically low — helping you avoid unexpected shutdowns.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Voltage Thresholds:\u003c\/strong\u003e Set your own high and low voltage limits to accurately define full-charge and fully-discharged levels for your specific battery type.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Backlight Timer:\u003c\/strong\u003e Built-in display backlight with configurable timer — choose constant-on or auto-off timed mode to conserve energy.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower-Off Memory:\u003c\/strong\u003e Automatically saves charge data during unexpected power interruptions so you never lose your settings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Battery Compatibility:\u003c\/strong\u003e Supports ternary lithium (3S–12S), lithium iron phosphate (3S–14S), and lead-acid batteries (12V \/ 24V \/ 36V \/ 48V).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Ultra-slim at just 40 × 15 × 3 mm — fits easily into panels, enclosures, and custom battery builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Measurement Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 7–55V (Red display: DC 7–40V)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 20mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLED\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed, Green, Blue, White (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDefault Power-Up Mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eL03S Ternary Lithium Battery (L03)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTernary Lithium (L) Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3S – 12S\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLithium Iron Phosphate (F) Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3S – 14S\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLead-Acid (P) Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12V \/ 24V \/ 36V \/ 48V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 × 15 × 3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the Box?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Battery Level Indicator Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products You May Like\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-50-psi-dial-tire-pressure-gauge-car-motorcycle-bike\"\u003e0–50 PSI Dial Tire Pressure Gauge – Car, Motorcycle \u0026amp; Bike\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-5l-electric-high-pressure-foam-sprayer-portable-car-wash-gun\"\u003e1.5L Electric Foam Sprayer – Portable High-Pressure Car Wash Gun\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on battery safety and handling, refer to the U.S. Consumer Product Safety Commission's guide on rechargeable batteries.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual product color may vary slightly from images due to monitor brightness and ambient lighting. Please allow for minor measurement tolerances.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/MagSafe_%28wireless_charger%29\" target=\"_blank\" rel=\"noopener\"\u003eMagSafe (wireless charger)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What battery types are compatible with this DC 7-55V battery level indicator?\u003c\/h4\u003e\n\u003cp\u003eA: This battery level indicator supports ternary lithium batteries (3S–12S), lithium iron phosphate \/ LiFePO4 batteries (3S–14S), and lead-acid batteries at 12V, 24V, 36V, and 48V configurations — making it widely compatible with electric vehicles, solar storage, and custom battery packs.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I customize the voltage thresholds on this battery charge indicator?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The indicator features adjustable high and low voltage threshold settings, allowing you to define exactly what constitutes a \"full\" or \"empty\" charge for your specific battery chemistry and cell count.\u003c\/p\u003e\n\u003ch4\u003eQ: Will the indicator retain my settings if power is unexpectedly cut?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The built-in Power-Off Memory function automatically saves your current charge data and custom settings even during unexpected power interruptions, so you won't need to re-configure each time.\u003c\/p\u003e\n\u003ch4\u003eQ: What does the flashing red lightning symbol mean?\u003c\/h4\u003e\n\u003cp\u003eA: The flashing red lightning symbol is a low-voltage alert. It activates when your battery charge drops to a critically low level, giving you a clear visual warning to recharge or replace the battery before a shutdown occurs.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What battery types are compatible with this DC 7-55V battery level indicator?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This battery level indicator supports ternary lithium batteries (3S–12S), lithium iron phosphate \/ LiFePO4 batteries (3S–14S), and lead-acid batteries at 12V, 24V, 36V, and 48V configurations — making it widely compatible with electric vehicles, solar storage, and custom battery packs.\"}}, {\"@type\": \"Question\", \"name\": \"Can I customize the voltage thresholds on this battery charge indicator?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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