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LEOCH DJM series batteries

The step from small standby power into medium systems — more capacity, and floor loading and cooling start to matter.

LEOCH DJM series product photo Product photo
Appearance for reference only; actual specification and accessories follow the quotation.
Brand
LEOCH
Type
Valve-regulated lead-acid (AGM, medium capacity)
Typical use
Mid-size UPS strings, DC switchboards, telecom systems
Models covered
LEOCH DJM series (12 V, by capacity)
Category
Batteries and battery packs / VRLA / AGM batteries

Crossing a threshold: installation conditions start to matter

A small battery can be put almost anywhere without trouble. At medium capacity, the installation conditions decide how long the string actually lasts.

Three places it goes wrong:

1. Loading. The total weight of a medium string is routinely underestimated. On an ordinary shelf or an unstrengthened floor it can deform or topple. Confirm the load capacity before installation.

2. Cooling. Blocks in the middle of a string run hotter than those at the ends, and a sustained temperature difference ages them unevenly — the string performs to its weakest block. Blocks need ventilation clearance and the battery room needs basic airflow.

3. Connection quality. A loose terminal raises contact resistance and causes local heating, and it is a common cause of battery incidents. Torque to specification at installation, and re-check at each service.

Practical maintenance

  • Annual terminal voltage measurement: find the blocks reading noticeably low and deal with them early.
  • An actual discharge test every 1–2 years: the only way to confirm how much capacity is really left.
  • Keep a record: retaining the measured figures shows the trend, instead of "it feels worse than before".
  • Watch the temperature: if the battery room runs hot, improve the ventilation or air-conditioning first, or even the best batteries will be wasted.

What we provide

String sizing (voltage, capacity, number of strings), installation with a loading and cooling assessment, full string replacement, old battery collection, and a measured discharge test with a record on handover. This can sit under an annual maintenance contract that tracks battery health over time.

Key features

  • Medium capacity, for UPS systems needing longer runtime or a larger load
  • Valve-regulated (VRLA), maintenance-free
  • Designed for float duty in UPS and DC systems
  • Can be combined into multiple parallel strings where needed
  • For machine rooms, telecom sites and power systems

Where it fits

Mid-size machine room UPS

Systems needing longer runtime or a larger load, built from several blocks into the required string.

Power and telecom DC switchboards

Backup energy for DC operating supplies.

Sites where replacement is expensive

Where the work itself costs a lot, durability and consistency matter more.

Frequently asked questions

What matters when installing a medium string?
Three things. Loading — the total weight is not small, and the shelf or floor has to carry it. Cooling — blocks need ventilation clearance, or the middle of the string runs hotter than the outside. Connections — cable size has to suit the current, terminals have to be torqued and re-checked later. Get these wrong and the string's real life falls well short of its design life.
Is there a limit to parallel strings?
Yes. Too many parallel strings increase circulating current and the risk of imbalance; in practice the configuration follows the host specification and manufacturer guidance. If you need more capacity, larger individual blocks are usually the steadier route than adding strings indefinitely.
How does a medium block differ from a standard small one?
Capacity, plate design and expected life, mainly. Medium blocks suit higher discharge currents and longer runtimes, and they place higher demands on the installation — loading and cooling. Do not judge by the capacity figure alone; check whether the installation conditions support it.

Related models & accessories

LEOCH DJW series

A general-purpose 12 V battery, and one of the most common specifications inside a cabinet UPS string.

View details

LEOCH OPzV series

When replacing the battery costs more than the battery, the durable class starts to pay for itself.

View details

C&D LBTY series

The value of a long-life specification is not on the datasheet — it is in the answer to how many times you replace it in ten years.

View details

Specifications

Voltage12 V (per block)
Capacity rangeMedium capacity, by model — confirm with us
TypeValve-regulated lead-acid (AGM)
DutyFloat (UPS / DC switchboard)
Design lifeAround 5–8 years in good conditions
MaintenanceNo topping up; check terminal voltage and actual discharge capability annually
InstallationConfirm rack loading, cooling clearance and cable routing
Typical equipmentMid-size UPS, DC switchboards, telecom equipment, power systems

Specifications follow the manufacturer's latest data. Actual configuration must be sized against the site load, required runtime and distribution environment — this table is for selection reference only.

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