# Samsung SDI 1st to meet global indoor battery fire safety standard > Source: > Published: 2026-07-14 02:17:03+00:00 Samsung SDI said Tuesday its uninterruptible power supply (UPS) batteries have become the first in the industry to pass a global indoor fire safety test, bolstering its competitiveness in the fast-growing artificial intelligence (AI) data center market. The battery maker said its UPS batteries met all criteria in UL Solutions' Indoor Large-Scale Fire Test (LSFT), becoming the first in the world to meet the standard. UPS systems provide emergency power during outages or voltage fluctuations and are considered critical infrastructure for AI data centers, where uninterrupted power is essential. The Indoor LSFT, introduced by UL Solutions earlier this year, evaluates whether a fire intentionally ignited in a battery module spreads to adjacent racks or systems under conditions that simulate real-world UPS operations. During the test, the battery module in which thermal runaway was intentionally initiated was completely consumed by fire, but the flames did not spread to adjacent racks. According to Samsung SDI, no gas release, explosion or rupture was observed, and the system met all required