Description
Upgrade your single‑cell (1S) lithium‑ion packs with the Mini 3.7‑4.2V Li‑ion Battery Level Indicator. This ultra‑compact 5 × 9.5 mm module provides a clear, four‑step LED display that instantly shows the remaining charge, helping you avoid unexpected power loss and extend the life of your devices.
Key Highlights
- Compact footprint – only 5 mm × 9.5 mm, perfect for tight spaces.
- Four‑level LED bar (green‑yellow‑orange‑red) delivers an intuitive visual charge readout.
- Wide operating voltage range: 3.7 V – 4.2 V for standard 1S Li‑ion cells.
- Low quiescent current (≈ 30 µA) minimizes self‑discharge when not in use.
- Easy PCB mount with standard 2.54 mm pitch pins; no soldering of additional components required.
- Built‑in over‑voltage and under‑voltage protection for safe, reliable operation.
Why Choose This Indicator?
Designed for hobbyists, OEMs, and small‑batch manufacturers, the indicator offers fast assembly and dependable performance. Its four‑step display gives users a quick visual cue—green for full, yellow for 75 %+, orange for 50 %+, and red for 25 %‑or‑lower—so you can manage power consumption proactively.
Technical Specifications
- Supply voltage: 3.7 V – 4.2 V (single Li‑ion cell)
- Display: 4‑LED bar, each LED 2 mm × 2 mm
- Dimensions: 5 mm × 9.5 mm × 1.8 mm (height)
- Operating current: 30 µA (idle), 5 mA (full LED display)
- Pin configuration: VCC, GND, LED‑OUT (common cathode)
- Temperature range: –20 °C to +85 °C
- Package: Surface‑mount (SMT) compatible with standard reflow processes
Ideal Applications
- Portable electronics (flashlights, Bluetooth speakers, handheld tools)
- RC hobby batteries and drone power modules
- DIY Arduino / Raspberry Pi projects
- Medical and wearable devices that require clear battery status
- Prototype and small‑scale production runs (available in packs of 1‑100 pcs)
Ordering Information
Choose the quantity that fits your project—available in packs ranging from 1 to 100 pieces. All units are pre‑tested for accuracy and come with a quick‑start guide to get you up and running in minutes.
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