Most batteries come with a raised area on their negative terminal to allow the heatshrink sleeve to curl round at the end, but some batteries have a flat base and the heatshrink can stop them making a proper connection in some chargers and battery holders.
By using a sharp knife to slice the ring of heatshrink on the negative terminal off, you can make those batteries work in most instances.

4 thoughts on “Fixing the batteries that make a bad connection in your charger.”
  1. Avataaar/Circle Created with python_avatars Lee Bartholomew says:

    usually grinding the dirt down with a fiberglass eraser does it. and there is no label covering the bottom of the AAA NiMh batteries. Figured that out long ago.

  2. Avataaar/Circle Created with python_avatars Hobo Sullivan says:

    I'd probably have dabbed a little solder onto the too-flat terminal. I think your solution is probably cleaner.

  3. Avataaar/Circle Created with python_avatars Gadgetboy says:

    That's so much simpler than my applying a dab of solder to the -ve contact on the charger.

    Edit: I have a bad habit of REALLY over-engineering things.

  4. Avataaar/Circle Created with python_avatars markybyeah says:

    I got some catching up to do from a few videos you've posted in the last few days.

    Keep them coming sir

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.