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Questions tagged [batteries]

Hacks related to batteries and other energy cells.

Hacks related to batteries and other similar storage devices.

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Any questions considered off-topic on this site, may be considered on-topic at Electronic Engineering SE.

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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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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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5 answers

How do I know how much charge a battery has left?

I have a box full of batteries (AA, AAA, 9V, and CR2032). I know some are empty because I chucked them in there together with full ones, which was probably not a smart thing to do. Is there an easy way to know the (approximate) charge of these…
Martin Tournoij
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8 answers

How can I charge a single rechargeable battery?

I have a battery charger that requires batteries are charged in pairs. However I have a wireless keyboard that uses three batteries. Is there a (safe) way I can charge all of the batteries at once? I usually have to go through two sets before I can…
James Webster
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9
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5 answers

How do I prevent batteries from leaking?

I have recently bought a battery powered LED lamp for use on a camping trip. When I return I would like to have it ready for use at home when the power goes out. I am concerned that as it will be unused for long periods of time the batteries may…
Kelly Thomas
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1 answer

How can I re-seal hearing aid batteries that have been accidentally unsealed?

Zinc-air hearing aid batteries come with a sticky tab on them to prevent air contact; once this tab is removed, the battery starts draining. The instructions warn that "thou shalt not removeth this tab until a few minutes before thine need of…
goldPseudo
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4 answers

How do I make my smartphone battery last longer?

My phone battery lasts often less than 3 hours. How do I get more life out of it? FYI, it's a 3 year old Apple iPhone 5.
Coomie
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7
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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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6
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5 answers

How to extend the lifetime of a rechargeable battery?

Telephones sometimes don't have a replaceable battery, so how do you extend the life and ability to hold a charge of a rechargeable battery in one?
Varon
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Question on Increasing Longevity of Laptop Batteries

Is it possible to make my laptop charger only charge when the battery is almost dead? Then, once it is fully charged to not activate charging again until it becomes close to dead again? Would that require an adapter of some sort?
napsareessential
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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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How to clean a pager charging port

I need help cleaning the connection on a Motorola Minitor (yes, I spelled it correctly) V pager. Basically my issue is that the connection between the battery and charging pins is no longer the best and so I frequently have to wiggle it around in…
L.B.
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6 answers

How to improve the life of mobile phone battery?

We all use phones. Sometimes our phone's battery gets low and we have no resources to charge it. What is the best solution for preventing our mobile phone from turning off, while it is in battery saver mode?
Chawlish Boy
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4 answers

How to recover swollen battery?

Many have faced this issue. So this is a general question. I am using a smartphone from last 3 years. Now it's battery is swollen and there is some liquid developed inside the battery. Due to this, the battery is pushing the cover out. But the…
Creepy Creature
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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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