FRC Battery Fuel Gauge (SB120-Blue) RoHS

Description

Your robot represents many thousands of dollars and hundreds of hours of effort. Don't let a dead, low-performing, or weak battery cut even a single match short. Ensure your robot performs at its best, every time, with the BFG!

The BFG is a precision sensor, integrated into a SB120 battery cable assembly, that monitors battery current and voltage to identify discharge rate, current spikes, voltage dips, depth of discharge, and more. These measurements are performed 100 times a second 24 hours a day to provide you with a full picture of your battery's overall health and state of charge. Since the BFG is always connected it knows how hard each battery was used, how it was cared for, and compiles that data into a comprehensive health metric you can instantly view from the onboard OLED display.

Monitor your battery's health Battery load testers only tell part of the story. The BFG watches every charge and discharge, and with the help of its advanced state estimation model, you have a robust, integrated solution to understand your battery's health and capacity at a glance - no load tester required.

Maximize your battery investment All batteries wear out, losing capacity each charge/discharge cycle. Use the BFG to watch your depth-of-discharge during practice. When you see the battery approach 60-70 percent discharged, replace the battery with a freshly charged one. The less you discharge each battery each cycle the more cycles they will last, with deep discharges being especially damaging.

Upgrade to SB120 connectors BFG is the best reason yet to move your team to the SB120 connector ecosystem. High capacity lugs, low resistance wires, less energy waste, and less heat all improve performance. In addition, the BFG lugs are pull-tested and crimped using a true 6-sided die. Bad crimps aren't just match ending, they can cause wires and connectors to dangerously overheat.

Battery state at your fingertips Monitor the state of your battery using the built in OLED screen, or watch it remotely via CAN telemetry. A 24-bit ADC allows BFG to measure with milliamp precision while still able to see 500A spikes in either direction. Each unit is load tested and calibrated, meaning each BFG isn't just precise, it's accurate too.

Comprehensive battery data Statistics are grouped by battery charge/discharge cycle and by robot match. The BFG continuously tracks:

• Battery voltage and current
• Minimum voltage (diagnose brownouts)
• RMS Current (estimate average load during matches)
• Peak current (max current seen during the last match)
• Battery capacity (how much energy does full charge store in Ah and Joules)
• Battery charge (how much energy is left in the battery in Ah and Joules)
• Effective capacity (how many Ah or Joules are left at the current discharge rate)
• Battery age (in cycles and days)

FRC Legal The BFG is legal for the 2026 FRC season and qualifies as valid modification to the robot's electrical system under R625.

Regarding robot weigh-in, the BFG is not covered under the allowance in R103 and should be included in the robot's overall weight. Teams and LFIs should add 1.0 oz to the measured robot weight to account for the BFG (BFG assembly weight, minus the lugs, terminals, and 12" 4AWG wire excluded by R103)