Fiamm UPS batteries are the excellent choice for all Critical Power Standby Emergency Power Uninterruptible Power Supply Backup needs. Long Life High Rate FLX series batteries are 12FLX200 12 volt 55ah, 12FLX300 12 volt 75ah, 12FLX350 12 volt 90ah, 12FLX400 12 volt 100ah, 12FLX500 12 volt 135ah and 12FLX540 12 volt 150ah.