Hacks related to batteries and other energy cells.
Hacks related to batteries and other similar energy storage devices.
See also: electricity
Any questions considered off-topic on this site, may be considered on-topic at Electronic Engineering SE.
Questions tagged [batteries]
23 questions
25
votes
12 answers
How to make my batteries work for a short time, one last time
What would be a good trick to make my batteries work one last time?
Right now, I was using my trusty USB wireless mouse and the batteries died, right in a bad time.
What is a good way to make them work for at least 15 minutes, one last time, before…
Ismael Miguel
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22
votes
4 answers
How do you test if batteries are good?
I have a huge flashlight which runs on eight D batteries. I gathered the eight batteries, but I'm not sure if they are all good, and I don't really want to test them all.
I tried testing them all out, two at a time on another smaller flashlight, but…
michaelpri
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7
votes
8 answers
What can I use to replace a missing battery cover?
I lost a battery cover for my TV remote control. It is similar to the one in this photo.
It is a very old model TV so I don't think replacement parts are available. What would make a good substitute battery cover?
Ideally something which is easily…
LeopardSkinPillBoxHat
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4
votes
9 answers
Use two 2025 batteries instead of one 2032 battery
Intro:
2032 and 2025 are literally the dimensions of the battery. A 2032 is 20mm in diameter, 3.2mm thick, and a 2025 is slightly thinner, at 2.5mm thick. They usually both have the same voltage (3V), and assuming they fit in the case, they are…
Danny Schoemann
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3
votes
5 answers
Changing a smoke detector battery with a too-short ladder
I am a short person (5'1", 154 cm) with tall ceilings (15 feet, 457 cm). I have an 8-foot ladder (244 cm). On this ceiling I have a smoke detector whose battery needs to be replaced. On this model, this involves unscrewing the case, removing the D…
Roddy of the Frozen Peas
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2
votes
2 answers
Can you extract the remaining charge on weak alkaline batteries (AA, AAA, 9V, etc.) to charge rechargeable batteries (NiMH or Lithium-Ion)?
Instead of just disposing of weak alkaline batteries, is it possible to extract the remaining charge to charge re-chargeable batteries? I imagine theoretically you can attach the weak batteries to a battery charger, but how do you ensure that the…
Kevin Kaufman
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2
votes
3 answers
How can I replace digital alarm clock batteries without it losing the time and date?
My digital alarm clock takes 2 AAA batteries. Every time that I have to replace it's batteries it loses the time and date.
I tried to replace first 1 battery and then the other (so that the system will always have at least 1 battery during the…
papakias
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