Power Systems You Can Depend On

Sealed FNC Battery Solutions

Key Features:


* Zero Maintenenace


* Ultra-High Power Capacity


* Superior Recharge Capacity


* No Capacity Fading


* High Reliability


* Long Cycle Life



The Only Manufacturer of

Sealed “Zero Maintenance”

FNC Batteries

Acme’s sealed FNC batteries and power electronics form the basis of an advanced power system that is the top choice for the world’s most demanding aerospace, military, industrial and medical applications.

Acme’s sealed fiber nickel-cadmium battery systems start APU’s, avionics and environmental systems aboard Boeing 777’s and U.S. Army Apache Longbow attack helicopters.

Zero Maintenance

Means Low Operation Cost

The main advantage of sealed batteries is the reduced costs associated with frequent maintenance tasks. There is no required water replacement or regular battery cleaning necessary.  A “deep discharge” to avoid “memory” capacity loss is also not necessary with Acme’s Sealed FNC batteries.



Ultra-High Power Capability

A sealed FNC cell can sustain very high discharge currents that are often required for Auxiliary Power Units (APU) in aircraft engine starting or direct engine starting.


A large cell with a capacity of 47 Ah can be discharged at 2000 Amps for 10 seconds without damage.

High Reliability

The FNC cell’s unique construction places the active materials inside the flexible fiber substrate plates. The plates are welded together and submerged in an alkaline electrolyte and the cells are assembled in welded stainless steel jars.

This unique construction eliminates corrosion of the active materials or current-carrying components typical of lead-acid batteries.

Long Life Cycle

Sealed FNC cells have shown outstanding cycle life at both low and high rates of discharge. A 47 Ah battery was subjected to accelerated, large APU start cycles at +31C, with the following characteristics:

1. Discharge 1000 Amps for 5.6 seconds

2. Discharge 400 Amps for 25 seconds

3. Charge 57 Amps to a 2C positive temperature change

4. Rest 4 minutes

5. Repeat steps 1 through 4-250 times

6. Capacity check cycle

Lithium Batteries