Laptops today are powerful and portable, but their slim build means fewer ports and memory card slots- and therefore more dongles. The LaCie 1big Dock is here, not only to help you safely store and back up loads of footage, but to charge your phone and USB devices, let you offload files, connect pro 4K monitors, and power your laptop. All through a single cable that leads from your drive to your laptop and dishes out incredible Thunderbolt 3 performance. Output voltage: 12 VDC. Battery information: Maintenance free lead acid hot swappable, battery life: 3- 5 year, battery mounting: 19 inch battery tray. Form factor: Internal, 5U rack height. Color: Black. Modules: 4 x battery module. Replacement battery cartridge quantity: 1. Operating temperature: 0- 40 deg C,- 15- 45 deg C(storage), humidity: 0- 95%(operating and storage), altitude: 0- 10000 ft, 0- 50000 ft(storage). Compatibility: APC symmetra transformers: SYH2K6RMT, SYH4K6RMT, SYH6K6RMT, SYH2K6RMT P1, SYH4K6RMT P1, SYH6K6RMT P1. Weight: 49.00 lbs. Warranty: 2 years limited.