Description
Unitech Ni-Cd AA900mAh 3.6V Battery Replacement
Unitech 3.6V 900mAh NiCd battery replacement: If your emergency light or exit sign won’t stay illuminated during a power outage, a worn backup battery is a common cause. This Unitech 3.6V 900mAh Ni-Cd (AA900) replacement battery is intended for compatible emergency lighting and exit sign fixtures that require a 3.6V Ni-Cd pack.
Confirming the Correct Replacement (Important)
Emergency lighting batteries are often very similar, but can differ by connector type, wire lead length, and pack configuration. To ensure correct fit, compare:
-
- Label details: Voltage (3.6V), chemistry (Ni-Cd), and capacity (900mAh)
- Connector: Black Wing
- Polarity: Wire color and pin position must match the fixture’s harness
- Pack layout: Cells and shape must fit your battery compartment
Specifications
- Battery Type: Replacement battery pack
- Voltage: 3.6V
- Capacity: 900mAh
- Chemistry: Ni-Cd (Nickel Cadmium)
- Cell Configuration: 3 AA Cell
- Connector: Black Wing
- Wire Leads: Black Red
Common Uses
- Exit signs with battery backup
- Emergency wall/ceiling lights
- Commercial emergency lighting fixtures
Models This Battery Replaces
Use this section to target search terms customers use when reading old labels.
- Unitech: AA900 (3.6V 900mAh Ni-Cd)
- Cross-reference: CUSTOM-256, OSA257, BCN800-3GWP-BLACK WING
Exit Light / Emergency Fixtures This Battery Is Used In
Fixture compatibility varies by connector and battery compartment.
Models listed below have been verified in the field.
- Lithonia EU2 LED
- Lithonia ELM2LED
- Lithonia ELB B001
- Lithonia ELBB001
- Lithonia ELB B001 R6
- Lithonia EBE256
- Dantona CUSTOM-256
- OSI OSA257
- BCN800-3GWP-BLACK WING
- BGND001
- Battery Guy 18626
- EME ELB-B001
- ANIC1566 Interstate
- 0253799 Unitech
- Home Depot ELB-B001
- Grainger Battery ELB-B001
- Grainger 38GT89
- AA900mAh Unitech
- Battery Depot CM1185 / CM-1185
- Unitech 0253799
Testing & Maintenance Tip
After installing a new battery, allow adequate charge time and perform the fixture’s test function per the manufacturer’s instructions. If a unit still fails a test, the issue may be a charger board, lamp/LED driver, or wiring—not just the battery.
Need Help Matching the Right Battery?
Contact us with:
- Photo of the original battery label
- Photo of the connector close-up
- Approximate battery dimensions / pack shape
We’ll help you match the correct replacement so you can replace the battery—not the fixture.
FAQ
How do I know this Unitech 3.6V 900mAh battery will fit my exit sign?
Match the voltage (3.6V), chemistry (Ni-Cd), and confirm the connector type and polarity. If you send photos of your old battery label and connector, we can help verify fit.
What’s the difference between Ni-Cd and NiMH?
They are different chemistries and are not always interchangeable in emergency lighting chargers. Replace with the same chemistry shown on the original label unless your fixture manufacturer explicitly allows a change.
My fixture charges but fails the test—does that mean the battery is bad?
Often yes, but not always. Chargers, LEDs/lamp heads, wiring, or control boards can also cause failures. A fresh battery is a common first fix, but we can help troubleshoot if problems continue.
Do you offer discounts for bulk orders (schools, facilities, property managers)?
Yes. If you’re replacing batteries across multiple fixtures, contact us for a bulk quote.
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