Lithium Batteries

   
What happens when the power goes out?

• Most access control systems rely on lithium batteries to maintain your database integrity when the power goes out.
• These batteries have about a 10-year lifespan.
• Many times, these batteries cannot be tested without turning off the power.
• Most of these batteries cannot be replaced.
• Those that can be swapped require expensive on-site maintenance by trained technicians.

Lithium batteries in access control systems pose a fire risk

• The FAA classifies lithium batteries as hazardous materials.
• When a lithium battery short-circuits or overheats, it can catch fire or explode.
• U.S. Government testing has shown lithium battery fires burn extremely hot.
• These fires are exceptionally difficult to put out.
• Is this the power source a business should rely on in an emergency?

   Fire  

 

   
computer burn
  
Millennium Group's Supercapacitors offer a safer, long-life power supply backup

• Unlike batteries, supercapacitors store energy in an electrostatic field.
• So there's no hazard associated with a chemical reaction.
• They have an extremely long life.
• Supercapacitors can be recharged hundreds of thousands of times, unlike conventional batteries.

Altair Nanotechnologies Press Release

February 2006
"Rechargeable lithium ion batteries currently use graphite for the negative electrode and typically lithium cobalt oxide for the positive electrode. The electrolyte is a lithium salt dissolved in an organic solvent which is flammable. During charge, lithium ions deposit inside the graphite particles. However the rate at which lithium ions can deposit is limited by the electro-chemical properties of the graphite, and if they can not enter the graphite particles they, instead, may collect (plate) on the negative electrode’s surface as lithium metal. If this plating occurs, the battery will severely degrade in performance and in extreme cases, will short, causing overheating and thermal runaway – a major fire hazard."

  

 

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