EnerSys PowerSafe RM 18

1.2V 18Ah Nickel-Cadmium Battery for UPS / Utility / Telecom
Part Number: RM 18
Manufacturer: EnerSys
Family: PowerSafe
Series: PowerSafe NiCd
Sector: Data Center

The PowerSafe® RM series of nickel-cadmium (Ni-Cd) batteries are specifically designed for "mixed loads" that includes both high and low rates of discharge. The pocket plate design and Ni-Cd chemistry provide exceptionally long life at extreme temperatures. This coupled with the inherent low maintenance requirements make the PowerSafe RM battery series an ideal choice for UPS, utility and telecommunication applications. The robust design means an excellent resistance against electrical and mechanical stress, low risk of terminal degradation and a proven 20 year plus service life. This combination and extensive use in service make the PowerSafe RM battery the right choice for industrial applications requiring superior reliability and the highest safety integrity covering discharges of 30 minutes to more than three hours.

  • Single one piece container construction
  • Ni-Cd pocket plate design
  • Long storage and shelf life
  • Wide operating temperature
  • Low risk of terminal degradation
  • Translucent plastic case for visible electrolyte level verification
  • Proven 20 plus year service life


Volts: 1.2V
Battery Capacity (aH): 18Ah
Capacity Rate: @ 5 hour rate to 1.15 volts per cell @ 68°F (20°C)
Length: 46 MM
Width: 85 MM
Height: 237 MM
Weight: 1.5 KG


  • Robust construction means low risk of terminal degradation
  • Dual post seal minimizes carbon formation
  • Plate lugs are connected to post by bolting or welding
  • Spacer plate prevents movement of the cell pack
  • Corrugated and perforated separator allows for free circulation of the electrolyte
  • Dilute potassium hydroxide electrolyte
  • Gas drying / flame arresting vent standard


  • Uninterruptible Power Supply
  • Utility
  • Telecom


  • Conforms to EN60623
  • Conforms to IEC60623
  • The management systems governing the manufacture of this product are ISO 9001:2008 and ISO 14001:2004 certified