C&D LBTY Series Long-Life 12 V Batteries

Before buying long-life batteries, check the environment

This is the question we always ask before quoting: where will the batteries go, and how warm is it there?

The reason is simple — lead-acid life is extremely sensitive to temperature:

Ambient temperature	Rough effect on life
25 °C (ideal)	The baseline for the design life
30 °C	Noticeably shorter
Above 35 °C	Possibly half the design value or less

So buying long-life batteries for a stuffy plant room is spending money where it will be discounted. In that situation, improving ventilation or air-conditioning usually returns more than upgrading the battery specification. We will tell you honestly which of the two is worth doing.

One consistent maintenance routine

Whichever battery you use, effective maintenance is the same set:

Every year: measure terminal voltage and internal resistance, and find the blocks that have drifted.
Every 1–2 years: an actual discharge test to establish the real capacity.
Continuously: keep the figures in a record so the trend is visible.
In good time: plan a full string replacement once measured capacity drops below 80% of the original.

The value of that routine is turning sudden failure into planned replacement. For a site that cannot stop, that is the difference between an emergency call-out and planned maintenance.

What we provide

Sizing, installation including a loading and cooling assessment, annual testing, full-string replacement, old battery collection, and records on handover. If you manage several sites, we can use one report format so they can be compared.

Key features

Long-life design; float service life longer than a standard AGM

Suits sites where replacement is awkward or needs a shutdown

Valve-regulated and maintenance-free, for cabinets and equipment rooms

Good batch consistency, suitable for multiple parallel strings

For machine-room UPS, telecom equipment and long-cycle backup

Where it fits

Machine-room UPS strings

Replacement carries a cost; long life reduces how often it happens.

Multi-string systems

Good consistency suits an architecture that runs strings in parallel.

Sites that are hard to service often

Maintenance-free operation reduces routine manpower.

Frequently asked questions

DNTY or LBTY — which should I choose?

Both are C&D VRLA lines with slightly different positioning: DNTY leans to telecom duty, emphasising consistency and over-discharge tolerance; LBTY leans to long life and low self-discharge, for long-float standby. The choice follows your regime — mostly float, or frequent cycling — the ambient temperature and how easy replacement is. Tell us the application and we will give a definite recommendation rather than leaving two model numbers for you to choose from.

Will a long-life battery really last 8–10 years?

The declared figure is a design value under ideal conditions: around 25 °C, correct float voltage, regular maintenance. Real life is usually shorter, most often because of high temperature or sustained undercharging. That is why we confirm the installation environment when quoting: if conditions are poor, the return on a long-life battery is much reduced.

How do I know when to replace them?

By measurement, not by looking. Check terminal voltage and internal resistance annually; rising resistance is usually an early indicator of capacity fade. Run an actual discharge test every 1–2 years to establish the real usable capacity. Once measured capacity falls below 80% of the original, plan the replacement.

Specifications

Voltage	12 V (per block)
Capacity range	By model — confirm with us
Type	Valve-regulated lead-acid (long-life AGM)
Design life	Around 8–10 years on float in good conditions
Maintenance	No topping up; check terminal voltage and internal resistance annually
Installation	Confirm loading, cooling clearance and cable routing
Typical equipment	Machine-room UPS, telecom equipment, long-cycle backup 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.

C&D LBTY series long-life batteries