14 votes
Accepted

How to recover swollen battery?

A battery, once it starts to expand or leak, cannot be safely "restored". A leaking battery will, at the least, corrode the phone and it also may catch fire. If you cannot change the battery yourself, ...
DrMoishe Pippik's user avatar
8 votes

What can I use to replace a missing battery cover?

I cut up an old plastic gift card. Fit it into the space and secured it with paper tape. It works great and holds the batteries in place.
Teresa's user avatar
  • 79
6 votes

How to recover swollen battery?

The battery is unrecoverable. It must be disposed of carefully and safely. You can possibly recover the phone. After removing the battery, you must carefully clean away any residue and liquid. ...
aaa's user avatar
  • 544
6 votes

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

My take is that the multiplier in the formula is incorrect. For 1.5 volt alkaline batteries it is (voltage-1)*200. For 9 volt alkaline batteries it is (voltage-6)*33.3. A 1.5V battery is exhausted at ...
Frank's user avatar
  • 61
6 votes

Can you extract the remaining charge on weak alkaline batteries (AA, AAA, 9V, etc.) to charge rechargeable batteries (NiMH or Lithium-Ion)?

You need a device commonly called a "joule thief" -- this is a DC to DC voltage converter that can take a low voltage input (like what you're getting from a nearly discharged primary battery)...
Zeiss Ikon's user avatar
  • 9,792
5 votes

Changing a smoke detector battery with a too-short ladder

As it has been stated before without truly reading your request, a specific type of ladder is your best bet along with a "reach tool." The "reach tool" for someone of your height would probably come ...
Flat Banana's user avatar
  • 1,006
5 votes

How can I replace digital alarm clock batteries without it losing the time and date?

Replace the batteries at 11:59 PM. By the time they're changed, it will be midnight, which will be the default time on your clock. You won't need to change the time at all!
BrettFromLA's user avatar
  • 11.5k
5 votes

Use two 2025 batteries instead of one 2032 battery

The reason two cells worked in your scale is that the scale is internally regulated to compensate for voltage drop as the battery runs down. If the scale worked with two of the 2025 cells, there's no ...
Zeiss Ikon's user avatar
  • 9,792
5 votes
Accepted

Use two 2025 batteries instead of one 2032 battery

A penny is 1.52mm and a dime is 1.35mm, according to the specs from the US mint. The OP is incorrect about the thickness of the CR2032 and CR2025, but correct that the name indicates the thickness... ...
Brian R's user avatar
  • 66
4 votes

Use two 2025 batteries instead of one 2032 battery

In this sort of situation, I normally use aluminium foil. It can be folded the required number of times to achieve the 0.7mm that you need. A good tip is to cut a strip of foil, maybe 20cm long and ...
Lefty's user avatar
  • 3,177
4 votes

Question on Increasing Longevity of Laptop Batteries

What you're asking for (how to prevent the battery from being recharged before it's empty) is not the best way to achieve what you want (avoid wearing out the battery). Discharging to 5% is not good ...
Hobbes's user avatar
  • 6,304
4 votes

Can you extract the remaining charge on weak alkaline batteries (AA, AAA, 9V, etc.) to charge rechargeable batteries (NiMH or Lithium-Ion)?

This would be like trying to fill a water cistern by gravity from one that is lower to one that is higher – impossible. It seems to be an XY problem. If the actual problem is not to waste the ...
Weather Vane's user avatar
  • 4,645
3 votes
Accepted

How can I replace digital alarm clock batteries without it losing the time and date?

To achieve that in electronical way! you can use something called Multiplexer "power mux" this IC works as a switch, it will take voltage from two sources when the main source cut out it will switch ...
Narzan Q.'s user avatar
  • 182
3 votes

How can I replace digital alarm clock batteries without it losing the time and date?

Replacing one cell at a time doesn't work because, first, a single cell has too low voltage to operate the clock, and second, the cells are in series, so both are required to form a circuit. If you ...
Zeiss Ikon's user avatar
  • 9,792
3 votes

How to clean a pager charging port

If it is a delicate connection, I wouldn't ever use sandpaper on it (nor do I think it would help). Connector problems usually fall in two categories: the pins and the jack do not connect properly (...
HenryJekyll1886's user avatar
3 votes
Accepted

How to extend the lifetime of a rechargeable battery?

Cell phone batteries (and everything else nowadays) uses Lithium Ion batteries. Unlike previous generations, these don't have a "memory" effect, so there's no need to completely discharge them all the ...
SurpriseDog's user avatar
  • 1,112
2 votes

How to extend the lifetime of a rechargeable battery?

Most rechargable batteries can have their life extended by following a few common rules. Most batteries tend to wear out when used when they are very cold or very hot. They also wear out after a ...
Mark Ripley's user avatar
2 votes

How do you test if batteries are good?

I touch "+" with tip of my tongue. If battery is dead, it is tasteless, otherwise it's like a lemon. Don't try it with 9 Volts or more - it's painfull. 1.5V is ok.
Arqwer's user avatar
  • 121
2 votes

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

For 9V batteries you may touch the contacts with the tip of your tongue and if you feel a light tingle that means there's still charge left. If you feel nothing, the battery is dead
Jorge's user avatar
  • 21
2 votes

How to prevent NiMH batteries from leaking?

NiMH cells should not leak unless abused. The following can damage them, causing leakage. Soldering, which overheats the polymer seal. Operation at very high or low temperatures, which causes ...
DrMoishe Pippik's user avatar
2 votes

How to prevent NiMH batteries from leaking?

NiCd and NiMH cells have a vent. If the cell is place in a position where the internal electrolyte level is above the vent, it may leak even when not charging or discharged (charging is actually more ...
Zeiss Ikon's user avatar
  • 9,792
2 votes

How to recover swollen battery?

No. When a battery starts to swell, it is broken and CANNOT be used anymore. This is a fire waiting to happen - and Lithium fires are very difficult to extinguish. it only addresses the symptom (gas ...
Hobbes's user avatar
  • 6,304
2 votes

How to improve the life of mobile phone battery?

in addition to the already mentioned things you can also turn off GPS and disable the automatically sync settings in your phone. Also there is an option "restrict background processes" in settings, ...
ritesh pahal's user avatar
2 votes

Use two 2025 batteries instead of one 2032 battery

First you are lucky if your scale still works. Doubling the voltage (as you described) by putting them in series can kill it. This is not advisable as it's dangerous to use electrical equipment with ...
user174174's user avatar
2 votes

Use two 2025 batteries instead of one 2032 battery

Needed a 2025 for my watch. I already had a bunch of 2016s - .9mm too thin. A dime was too thick to fill the gap so -- I mashed the dime with a hammer on an anvil til it was the perfect thickness. ...
Dan K's user avatar
  • 21
2 votes

How can I convert a wireless mouse to USB mouse?

How can I convert a wireless mouse to USB mouse? You must properly understand the current design of the mouse and the electronics circuit and components. However, they are a business secret, and you ...
virolino's user avatar
  • 2,640
2 votes

How can I convert a wireless mouse to USB mouse?

This would possibly be better off asked on electronics.stackexchange My thoughts on it are: obtain a usb extension cable hack the connector apart sufficiently to take power and ground wires off it ...
Caius Jard's user avatar
  • 2,759
2 votes

Question on Increasing Longevity of Laptop Batteries

You can impose your will on your laptop battery drain and charge limits using the power management utility found in your system preferences. Usually, this is set to optimize the balance between system ...
Stan's user avatar
  • 14.2k
1 vote

How to improve the life of mobile phone battery?

I keep hearing the 80/20 rule. Use it until about 20% and then charge it until around 80%. I try to keep to that and my battery health is good save for me jailbreaking and running it down a ...
Dopetacular's user avatar
1 vote
Accepted

How to improve the life of mobile phone battery?

This link might be helpful to you. In general, killing extra background processes and possibly switching off Bluetooth, Mobile Data and even WiFi for short durations of time will help extend the life ...
doodhwala's user avatar
  • 126

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