As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EMERGENCY BATTERY PACK AT POS. M1671 DEFECTIVE EMERGENCY LIGHT BATTERY PACK M1671 IS LOCATED AT STA 727C+13 WL 212 RBL 68.<[01] REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PACK AT POS. M1671 AND PERFORMED TEST AS PER B737 AMM 33-51-06-960-805. TEST PASS.;[02] VERIFIED STEP 1.