OptiMATE MONITOR O-127JAR Permanent Power Sport Battery Lead With Integrated Battery Status/Charge System Monitor For 12.8/13.2V Lithium

The OptiMate MONITOR O-127JAR is a permanent powersport battery lead with an integrated battery status and charging system monitor designed specifically for 12.8V / 13.2V lithium-ion (LiFePO4 / LFP) batteries. Once bolted directly to your battery terminals, it delivers 24/7 visual tracking of your lithium battery's true state of charge and automatically confirms whether your vehicle's charging system is pushing the correct voltage while running.

Features and Benefits

• Permanent lithium battery connection — Equipped with heavy-duty 1/4" (M6) / 5/16" (M8) combination ringlets that attach directly to your powersport lithium battery for consistent, hands-free tracking.

• SAE quick-connect charge port — The monitoring end doubles as an input; plug your lithium-specific smart charger right into the weatherproof SAE sleeve whenever your battery needs to be maintained.

• Length: 60 cm (24″) cable allows plenty of slack to cleanly route the connector from hidden battery compartments to a convenient viewing spot.

• Operation: 2 automatic Modes – Battery charge level monitor (single LED blink mode) & Charging system test (arrow mode).

• Lithium-optimized storage monitoring: 4 precise LEDs track the distinct voltage profile of 12.8V/13.2V Lithium (LiFePO4) batteries (4th checkmark LED >= 13.3V, matching a 100% full lithium cell). The corresponding LED blinks every 3 seconds, drawing less than 0.2mA of power to protect your battery during long-term storage.

• Vehicle running test: LED arrow mode automatically kicks in when the engine is running and charging voltage reaches the target threshold—confirming a minimum of 14.0V (single checkmark green LED) or the ideal lithium charging range of 14.3V+ (double checkmark green LED).

• 18 AWG / 0.82 mm² cable — Thick, high-grade wiring paired with rugged insulation to guarantee highly accurate voltage sensing.

• Inline safety protection — Features a built-in 15A fuse to fully shield your vehicle's wiring and the monitor from potential electrical shorts.

• Weather-proof design — Includes a durable rubber sealing cap and shroud that protects the terminal connection from moisture, rain, dust, and off-road debris.

• Rated for –40 °C/°F — Constructed with premium materials that stay flexible and operational even in extreme sub-zero winter temperatures.

What’s in the Box

• 1 × OptiMate MONITOR O-127 battery monitor lead (1/4"-5/16" Ringlets to SAE, 60 cm)

• Integrated 15A inline fuse

• Weather-proof rubber sealing cap for the SAE connector

Warranty

• 3-year limited replacement warranty