As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA - FLT 802 - EN-ROUTE PIT TO LGA - DURING THE FLIGHT, NR 1 BATTERY VOLTS OCCASIONALLY DROP TO 25V. THE CHARGE WOULD GO UP TO 5A, THEN RETURN TO 28 VOLTS AND 0 AMPS. A LIGHT ELECTRICAL ODOR WAS PRESENT, BUT NO SMOKE WAS EVIDENT. FLIGHT CONTINUED AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 1 BATTERY CHARGE LIMITER. OPERATIONALLY CHECKS OK.