12V Mini Battery Monitor Fuel Gauge Waterproof Battery Meter Using Five Segment LED Indicator to Display 10% to 100% Ba-ttery Power for 12V Lead-Acid(AGM,Gel, MF,EFB,SLA, VRLA,) with Crocodile Clips

This battery indicator can work on general 12V lead acid storage batteries. A 10-bit ADC MCU measures battery voltage and power level. It has a powerful battery level testing system and a unique design. It automatically sleeps after 30 seconds of no operation. This design helps save more energy.
Charger indicator: With a five-segment LED indicator, it displays 10% to 100% battery power level. It lets you know when to charge the battery: when battery capacity 10%, only 1 LED bar stays lit; when battery capacity 20%, it reminds you with only 1 LED bar flashing; when battery capacity 30%, it reminds you with 1 always-lit bar and 1 flashing bar. Operational errors are no longer a concern! Understanding the worries during installation, our battery monitor features advanced built-in reverse polarity protection. It effectively shields the core components from damage due to miswiring, providing comprehensive safety protection. These applications include cars, motorcycles, e-bikes, RVs, camper vans, boats, yachts, golf carts, sightseeing vehicles, solar power systems, home energy storage systems, RC models (such as aircraft and ship models), and drones, for all 12V Lead-Acid Batteries (AGM, Calcium, GEL, MF, EFB, SLA, VRLA, WET etc. ). The battery capacity indicator goes beyond showing "how much power is left. "
Its real value includes: 1. Over-discharge Protection warns when battery is low to prevent deep-discharge damage. 2. Usage Optimization helps plan device use based on remaining power. 3. Safety Enhancement avoids sudden power loss that could cause accidents (e. g., car lights failing at night). By alerting in time, it protects battery health, improves usage planning, and keeps equipment safe