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Tricks of the Trade - knowledge for every day life

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andy3055:
When the sticky residue from scotch tape remain on plastic surfaces (old tape tend to this), stick a new piece of scotch tape and pull it off rapidly like removing hair by waxing.
To preserve AA, AAA and even button cells, keep them in a cool place like in the refrigerator. They will last much longer than leaving them in a drawer.

Bud:

--- Quote from: cgroen on October 29, 2020, 05:09:09 pm ---
--- Quote from: nightfire on October 28, 2020, 08:33:01 pm ---Alkaline AA cells: Determine the charge by dropping them on the minus side on a hard table- when full, they will simply fall to the table- empty cells bounce back due to the changes in the chemistry.

--- End quote ---

The first time two of my colleagues told me that trick, I was like "are you serious", I thought they were trying to pull my legs.
But sure enough, it works every time! Now I have in turn won a couple of free beers on that account  >:D

--- End quote ---
I recall there is a EEVBlog video on this one.

Edit: Or it was a Big Clive's video

jmelson:

--- Quote from: andy3055 on October 30, 2020, 04:23:37 pm ---
To preserve AA, AAA and even button cells, keep them in a cool place like in the refrigerator. They will last much longer than leaving them in a drawer.

--- End quote ---
Do NOT, however, store wrapped in aluminum foil!  My wife's grandma did this and couldn't understand why all the batteries were dead.
I had to tell them why.

Jon

andy3055:
Of course! I bet he did not know that Al foil is a conductor.

Kasper:

--- Quote from: Bud on October 30, 2020, 04:50:15 pm ---
--- Quote from: cgroen on October 29, 2020, 05:09:09 pm ---
--- Quote from: nightfire on October 28, 2020, 08:33:01 pm ---Alkaline AA cells: Determine the charge by dropping them on the minus side on a hard table- when full, they will simply fall to the table- empty cells bounce back due to the changes in the chemistry.

--- End quote ---

The first time two of my colleagues told me that trick, I was like "are you serious", I thought they were trying to pull my legs.
But sure enough, it works every time! Now I have in turn won a couple of free beers on that account  >:D

--- End quote ---
I recall there is a EEVBlog video on this one.

Edit: Or it was a Big Clive's video

--- End quote ---

EEVblog #508 - Can You Test Battery Charge By Dropping It?


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