×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Batteries overdue for replacement

Batteries overdue for replacement

Batteries overdue for replacement

(OP)
Once again I seem to be asking about older UPS units. In this case we have some divisions who have put off battery replacements for a couple of years. That is to say, the maintenance tech visited the sites, found the batteries to be more than 5 -7 years old, recommended replacement each of the past two years, and now we have a tight budget year which is their excuse for not purchasing new batteries this year. The units are all ferro-resonant UPS units up to 12 years old. We had one unit fail earlier this year due to a thermal issue with the batteries. My question, to finally get to the point, is: Is there a physical danger to continually charging and using the old batteries?  

RE: Batteries overdue for replacement

Depends upon the battery type. They come in a few flavours depending upon the technology that's used to make them. Ni-Cads, Cells, Plante cells and VRLA to name but a  few.
I'll assume you're using VRLAs. These 'usually' come in two varieties. The 5 year life, (3-5 in practice), and the 10 year life, (7-10) in practice). But these figures are just guidelines because the battery manufacturer does not know how hot the environment is, how much ripple is on the charger, how many charge/discharge cycles they are subjected to , float voltage and and quite a few other things.
Now there will be circumstances where a battery has lasted far better than expected even under adverse conditions, but these are the exception. Remember it might only take one cell to fail and the entire battery may as well not be there.
Nobody really knows or could predict whether your battery will do what you need it to with absolute certainty but I say this. I don't believe you can replenish a gel/sealed battery, and once they start to dry out they get hot. It is by no means a daily occurrence but I have seen a few battery fires,  they are not good and they were NEVER on newer batteries - always for installations where we had repeatedly told the client to change them.
You have to balance the cost to your business should you either lose the load or have a fire, against the cost of battery replacement.
Only you can make that call.
I would get them changed.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close