EnerSys Powersafe DDm DDm50-17 Batteries

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The EnerSys PowerSafe® DDm 2DDm50-17 battery range offers an ideal solution for large capacity Valve Regulated Lead-Acid (VRLA) battery requirements. EnerSys PowerSafe® DDm 2DDm50-17 battery’s steel can (module) design, with its integral racking system, provides a cost effective battery system. This creates a compact, quick and simple installation process. EnerSys PowerSafe® DDm 2DDm50-17 battery, with its optimized recombination technology and extra thick plates, provides excellent performance and service life across a wide range of applications including: telecommunications, power generation/distribution sites, and UPS.

General Specifications:

Nominal Capacity (Ah):

10hr. rate 1.80Vpc @ 20°C: 400

8hr. rate 1.75Vpc @ 77°F: 400

Nominal Dimensions:

Length (mm): 176

Length (in): 6.9

Height (mm): 165

Height (in): 6.5

Can Depth (mm): 333

Can Depth (in): 13.1

Module Depth (mm): 366

Module Depth (in): 14.4

Typical Weight of Cell(s) in Can (kg): 34.0

Typical Weight of Cell(s) in Can (lbs): 74.7

Internal Resistance Micro-Ohms: 413

Short Circuit Current (Amps): 5048

Electrolyte (1.300 S.G.)

Volume (per cell) (oz): 166

Volume (per cell) (L): 4.9

Weight (per cell) (lbs): 14.1

Weight (per cell) (kg): 6.4

Pure Acid (1.835 S.G.)

Volume (per cell) (oz): 47.4

Volume (per cell) (L): 1.4

Weight (per cell) (lbs): 5.6

Weight (per cell) (kg): 2.5

Lead Weight (per cell) (lbs): 44

Lead Weight (per cell) (kg): 19.9

Additional Details


  • CATV & Broadband
  • Telecom
  • Utilities & Switchgear


  • AGM (VRLA)


Downloads & Documentation

See below for documentation relating to this product line that is available to download. To download this documentation, please click on the desired document you’d like to download and fill out the required form information fields. You will be able to view and download the documents upon completion of the download form.

  • EnerSys-PowerSafe-DDm-Battery-UBC-Rack-Range-Summary.pdf
  • EnerSys PowerSafe DDm Owners Manual
  • PowerSafe DDm Performance Specs
  • PowerSafe DDm Range Summary
  • SDS Nonspillable Lead Acid Battery
  • PowerSafe DDm mSeries Flooded Batteries Powerplant Disconnect Breaker Brochure