The Power to build a Community (22 Nov 2019)

Do you wish to set up a STEM club? Maybe you have an idea for a professional discussion group or maybe you want to collaborate better with the members of your Area Technician group. Then why not check out the TecHKnow GROUPS area now. We give you the power of TecHKnow in your hands to manage your personal GROUP. Check it out now by clicking on the main menu.

Question ZnCl Batteries

1 year 3 weeks ago - 1 year 3 weeks ago #41418 by AndyG
Is my mind failing?
I use lots of Panasonic ZnCl D cells made up as 6V battery packs. Used them for years. Deliberately don't use alkalines as they are too expensive, the short circuit current when new is too high and a set of batteries deliberately shorted out is still only a dead set of batteries irrespective of their technology!
I have routinely changed batteries when the pack voltage drops to 5.6-5.7V. They still give about 1.5A short circuit so are good for most 'battery and bulb' experiments.

In the past year or so I feel that I am changing batteries more often. I've been noticing "odd" battery packs that don't deliver current. I had two battery packs today; 5.5V open circuit and only 20mA short circuit (perhaps that's reasonable) but the second at 5.8V open circuit delivering 30mA s/c. The batteries appear balanced so not a dodgy one in the pack. It's as if they develop massive internal resistance - something which never used to happen.

Anyone else noticed similar life expectancy reductions with batteries?

Please Log in to join the conversation.

1 year 3 weeks ago #41420 by D.B.Ferguson
It may be corroded terminals rather than a battery issue.
Have a look at the spring holders and see if they have corrosion on them. Most packs can have the corroded unit removed and replaced with a new one.

Technicians: providing solutions and more.

David Ferguson B.Sc.

Please Log in to join the conversation.

1 year 3 weeks ago #41422 by AndyG
Checked those. New batteries always cure the issue and the problem is usually even across the pack, not just at individual terminals.

Please Log in to join the conversation.

Moderators: DampSquibTecHKnowD.B.FergusonTheOtherSeamusBaldilocks
Powered by Kunena Forum

Latest Forum Posts

More Topics »