{"product_id":"lipo-battery-capacity-indicator-1s-7s-5-led-voltage-tester","title":"LiPo Battery Capacity Indicator 1S–7S | 5-LED Voltage Tester","description":"\n\u003ch2\u003eInstantly Check Your Battery Level with 5 LED Indicators\u003c\/h2\u003e\n\u003cp\u003eNever be caught off guard by a dead battery again. The LOTHYE LiPo Lithium Battery Capacity Indicator gives you an instant, clear readout of your battery's charge level across a wide range of lithium battery configurations — from 1S single cells all the way up to 7S packs. With its ultra-slim profile and intuitive 5-LED display, this compact tester is a must-have for RC hobbyists, drone pilots, engineers, and anyone working with lithium, lead-acid, or lithium iron phosphate batteries.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy You'll Love This Battery Tester\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works with 1S to 7S lithium battery packs (3.7V–29.4V), as well as lead-acid, lithium iron phosphate, and electric vehicle batteries.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5-LED Power Display:\u003c\/strong\u003e Ultra-thin design with 5 LEDs showing charge status in four clear stages — 25%, 50%, 75%, and 100% — at a glance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReverse Connection Protection:\u003c\/strong\u003e Built-in safeguard means accidental positive\/negative reversal won't damage the module — just reconnect correctly and go.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZero Standby Drain:\u003c\/strong\u003e Press the button to activate the display; LEDs auto-off after 3–10 seconds and draw zero power at rest.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable \u0026amp; Lightweight:\u003c\/strong\u003e Made from high-quality materials. Weighs just 8g with a slim 40 × 15 × 2.5mm footprint — easy to install in any build.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e±2% Accuracy:\u003c\/strong\u003e Reliable readings with a tight 2% allowable error range for day-to-day monitoring needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupported Configurations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1S \/ 2S \/ 3S \/ 4S \/ 5S \/ 6S \/ 7S\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.7V – 29.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAllowable Error\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±2%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Stages\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25% \/ 50% \/ 75% \/ 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLead Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40 × 15 × 2.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-10°C to 65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eBattery Configuration Reference Chart\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1S:\u003c\/strong\u003e 3.7V nominal — 4.2V fully charged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2S:\u003c\/strong\u003e 7.4V nominal — 8.4V fully charged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3S:\u003c\/strong\u003e 11.1V nominal — 12.6V fully charged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4S:\u003c\/strong\u003e 14.8V nominal — 16.8V fully charged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5S:\u003c\/strong\u003e 18.5V nominal — 21.0V fully charged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6S:\u003c\/strong\u003e 22.2V nominal — 25.2V fully charged\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7S:\u003c\/strong\u003e 25.9V nominal — 29.4V fully charged\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLED Indicator Logic\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1st LED (Red): Power indicator — always on when button is pressed\u003c\/li\u003e\n  \u003cli\u003e2nd LED (Blue): On when voltage \u0026gt; N × 3.3V\u003c\/li\u003e\n  \u003cli\u003e3rd LED (Blue): On when voltage \u0026gt; N × 3.5V\u003c\/li\u003e\n  \u003cli\u003e4th LED (Blue): On when voltage \u0026gt; N × 3.7V\u003c\/li\u003e\n  \u003cli\u003e5th LED (Blue): On when voltage \u0026gt; N × 3.9V\u003c\/li\u003e\n  \u003cli\u003e\u003cem\u003eNote: 3.7V single-cell (1S) variant uses green LEDs; all other voltage ranges use blue LEDs.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eConnect the indicator's positive and negative leads to the corresponding terminals on your battery.\u003c\/li\u003e\n  \u003cli\u003ePress the red button lightly — the LED display will illuminate, showing real-time charge level.\u003c\/li\u003e\n  \u003cli\u003eRelease the button. The LEDs will auto-shut off after 3–10 seconds, consuming zero standby power.\u003c\/li\u003e\n  \u003cli\u003eIf wires are accidentally reversed, the reverse-protection circuit keeps the module safe — simply reconnect correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eRelated Products You Might Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0–10\/0–12\/0–25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which battery types are compatible with this LiPo battery capacity indicator?\u003c\/h4\u003e\n\u003cp\u003eA: This indicator is compatible with lithium (LiPo\/Li-ion) batteries from 1S to 7S (3.7V to 29.4V), as well as lead-acid batteries, lithium iron phosphate (LiFePO4) packs, and electric vehicle battery systems. It is not suitable for applications requiring greater than ±2% accuracy.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will connecting the wires backwards damage the battery tester?\u003c\/h4\u003e\n\u003cp\u003eA: No. The module features built-in reverse connection protection. If the positive and negative leads are accidentally swapped, the circuit will not be damaged. Simply reconnect the wires in the correct orientation and the indicator will function normally.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the indicator drain the battery when not in use?\u003c\/h4\u003e\n\u003cp\u003eA: No — this indicator draws zero power in standby mode. The LEDs only activate when you press the button, and automatically switch off after a 3–10 second delay once the button is released, making it ideal for permanent installation in battery-powered builds.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I read the charge level from the LED display?\u003c\/h4\u003e\n\u003cp\u003eA: The 5-LED display shows battery charge in four stages: approximately 25%, 50%, 75%, and 100%. The first (red) LED is the power indicator. Each additional blue (or green for 1S) LED that illuminates represents a higher charge level, based on the cell voltage thresholds for your specific battery configuration (N × 3.3V, 3.5V, 3.7V, and 3.9V per cell).\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which battery types are compatible with this LiPo battery capacity indicator?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This indicator is compatible with lithium (LiPo\/Li-ion) batteries from 1S to 7S (3.7V to 29.4V), as well as lead-acid batteries, lithium iron phosphate (LiFePO4) packs, and electric vehicle battery systems. It is not suitable for applications requiring greater than ±2% accuracy.\"}}, {\"@type\": \"Question\", \"name\": \"Will connecting the wires backwards damage the battery tester?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. The module features built-in reverse connection protection. If the positive and negative leads are accidentally swapped, the circuit will not be damaged. Simply reconnect the wires in the correct orientation and the indicator will function normally.\"}}, {\"@type\": \"Question\", \"name\": \"Does the indicator drain the battery when not in use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this indicator draws zero power in standby mode. 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