Upgrade your power backup with the APC Replacement Battery Cartridge 159. This maintenance-free, sealed, and leak-proof lead-acid battery is designed for reliability and longevity. With a hot-swappable feature, you can easily replace it without shutting down your equipment, ensuring uninterrupted power. The cartridge boasts a minimum lifespan of 3 years, making it a smart investment for your UPS system. Its sleek black design seamlessly fits into your existing setup, providing peace of mind during power outages. Keep your devices safe and operational with this essential battery replacement!