GS Portalac PX12072HG 12V 7.5Ah /12V 8.0Ah Accept no imitations. Power King Battery provides a dependable and long lasting battery and is often the preferred replacement over OEM for fiber to the home backup units Maintenance-Free. Leak proof sealed lead acid battery Designed for long life: 6 - 8 years. Rechargeable, maintenance free, and fully recyclable through Call2Recycle.org User Installable. Factory charged for easy installation. Compatibility: PX12072 - GT12080 1 Year Warranty!