1S–6S LiPo Battery Level Indicator 3.7–25.2V Capacity Tester
1S–6S LiPo Battery Level Indicator 3.7–25.2V Capacity Tester
LOTHYE 1S–6S LiPo / Li-Ion Battery Level Indicator with Marquee Display
Never be caught off guard by a dead battery again. The LOTHYE Battery Level Indicator gives you an instant, at-a-glance reading of your 18650, LiPo, or Li-Ion battery's remaining capacity. Compatible with 1S through 6S packs (3.7 V to 25.2 V), this ultra-thin module installs in seconds and delivers stable, accurate readings through a vibrant LED marquee display. When voltage drops too low, a flashing red light alerts you to recharge — keeping your equipment running and your batteries in top condition.
Made in Mainland China.
Key Features
- Wide Compatibility: Supports 1S, 2S, 3S, 4S, 5S, and 6S lithium battery packs (3.7 V – 25.2 V), covering 18650, LiPo, and Li-Ion chemistries.
- Low-Voltage Alert: Red LED flashes automatically when the battery voltage falls below the safe threshold, reminding you to charge before power cuts out.
- Ultra-Thin & Compact: Measures just 3.9 × 1.5 × 0.4 cm — easily mounts into drones, RC cars, e-bikes, power tools, and DIY projects without adding bulk.
- Simple 3-Wire Installation: Red wire → battery positive; black wire → battery negative; white wire → charger negative. No soldering expertise required.
- Durable Build: Constructed from high-quality materials with splash-resistant design (not submersion-rated) for broad application use.
- Long Service Life: Efficient, stable circuitry ensures consistent performance over thousands of charge cycles.
Supported Voltage Ranges
| Configuration | Nominal Voltage | Fully Charged |
|---|---|---|
| 1S | 3.7 V (min 2.7 V) | 4.2 V |
| 2S | 7.4 V | 8.4 V |
| 3S | 11.1 V | 12.6 V |
| 4S | 14.4 V | 16.8 V |
| 5S | 18.0 V | 21.0 V |
| 6S | 22.2 V | 25.2 V |
Specifications
- Brand: LOTHYE
- Module Size: 3.9 × 1.5 × 0.4 cm
- Exposed Opening: 3.2 × 1.5 cm
- Condition: New
- High-Concern Chemicals: None
Wiring Instructions
- Connect the red wire to the positive electrode of the battery.
- Connect the black wire to the negative electrode of the battery.
- Connect the white wire to the negative pole of the charger.
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: Which battery types is this LiPo battery level indicator compatible with?
A: This indicator is designed for lithium-based battery packs, including 18650, LiPo (lithium polymer), and Li-Ion (lithium-ion) cells. It supports 1S through 6S configurations, covering voltages from 3.7 V all the way up to 25.2 V fully charged, making it versatile for drones, RC vehicles, e-bikes, power banks, and DIY electronics projects.
Q: How does the low-voltage warning work on this battery capacity tester?
A: When the battery voltage drops below the safe operating threshold for your selected cell configuration, the LED marquee display flashes a red light as a low-voltage alert. This visual warning lets you know it's time to recharge before the battery is fully depleted, helping to extend overall battery life.
Q: Is this battery level indicator easy to install without professional tools?
A: Yes — installation is straightforward with just three color-coded wires. Connect the red wire to the battery's positive terminal, the black wire to the battery's negative terminal, and the white wire to the charger's negative pole. No advanced soldering skills are needed, and the compact 3.9 × 1.5 × 0.4 cm form factor fits neatly into most battery enclosures and DIY builds.
Q: Can this module be used outdoors or in wet conditions?
A: The module features a splash-resistant build suitable for general outdoor use, but it is not rated for full submersion in water. As long as it is not soaked or submerged, it can handle light moisture exposure, making it suitable for a wide range of outdoor RC and power tool applications.