ELP B039 – 6-Cell (3+3) 7.2V 4ah NiMH Emergency Lighting Battery

Cross referenced with other manufacturers part numbers:

BBL 6/1CM4-5-D-AMP
ELP B039
ELP B039
YUASA 6CHM3-8LA9

Equipment that uses this battery:

OM680/T5/LP

NIMH Batteries

NiMH (nickel-metal hydride) batteries are rechargeable power sources that use a hydrogen-absorbing alloy at the negative terminal and nickel oxide hydroxide at the positive terminal.

They offer higher energy density than older NiCd batteries and are more environmentally friendly, but they have a higher self-discharge rate than newer technologies like lithium-ion. NiMH batteries are commonly used in household electronics, cordless phones, and some hybrid vehicles.

How they work

During a discharge cycle, the negative electrode (metal hydride) releases stored hydrogen, and the positive electrode (nickel oxyhydroxide) absorbs hydroxide ions, generating electricity.

During a charge cycle, the process is reversed, with electrons flowing from the charger to the positive electrode and then to the negative electrode, storing energy.

Advantages

Higher capacity: Typically have two to three times the capacity of NiCd batteries.

Environmentally friendly: Contain fewer toxic elements than NiCd batteries, making them safer to dispose of and recycle.

Less prone to memory effect: Less sensitive to the memory effect than NiCd batteries.

Good performance: Can operate well at a wide range of temperatures and are efficient at high-rate discharges.

Disadvantages

Higher self-discharge: They lose their charge faster than some other battery types when not in use, though low self-discharge (LSD) versions are available.

Shorter lifespan: Generally have a shorter cycle life and lifespan compared to modern alternatives like lithium-ion batteries.

Susceptible to heat: High temperatures can degrade their performance and reduce their service life.

Lower energy density: Have lower energy density than lithium-ion batteries, limiting their use in high-performance or very compact devices.

Common Uses

Consumer Electronics: Remote controls, digital cameras, toys.
Tools: Cordless devices.
Automotive: Older hybrid electric vehicles.
Robotics & IT: Industrial applications.

Established in 1995 and based in the South-East, we are a team of experts with unrivalled knowledge and experience in safety lighting products, devices, and electronic circuits.  We hold a vast range of stock onsite which means no long lead times for your commercial project.  Therefore, if we have the products in stock that you need, we aim to get them to you the very next day.

We don’t just sell products we also develop them in-house. We specialise in manufacturing emergency lighting equipment and have vast engineering capabilities, so we can supply you with exactly what you need while meeting legal requirements.

We also customise existing products and create bespoke orders as part of our assembly and emergency lighting conversion work. Our technical support team is always available to give respected advice and support.

Our offering includes comprehensive testing to ensure all products are fully functioning and compliant with current regulations when they leave our site.