How long do rechargeable batteries last per charge?

Short answer: 1 to 3 hours

So many of the devices we use every day have batteries, and it seems like everyone has their rituals for making them last Some people store them in the fridge or unplug as soon as the battery is charged or even insist on only charging when the battery is on the brink of dying.

But when it comes to charging the batteries in things like your phone and laptop, it turns out that many of these strategies don’t do very much. And some are counterproductive. Batteries work using electrons that try to flow between electrodes but they’re blocked by an electrolyte, which only lets charges flow when wires directly connect the two sides. Once all the electrons have reached the positive electrode, the battery is considered discharged, meaning it’s out of power.

New Batteries that are recharged can last 1 to 3 hours.

Not so new rechargeable batteries can last 30min to 1 hr

All depending on the device the batteries are in.

Recharging the battery just involves pushing those electrons back onto the negative electrode to reset the whole process. All rechargeable batteries lose the ability to charge over time as the electrolyte breaks down and the pieces wear out.

But what those pieces are made of determines how to make a battery last as long as possible. A lot of those battery life myths you might hear apply to nickel-cadmium and nickel-metal hydride batteries.

The kind you might have in your TV remote. Because of the chemical reaction that produces the electrons, it is better to let them run down before recharging them and stop charging pretty much as soon as they’re fully charged.

Otherwise, crystals can form on the electrolyte, and the batteries can break or at least not hold as much charge as they should. But most portable devices these days, like your phone and your laptop, use lithium-ion batteries, which work differently.

Lithium-ion batteries do get damaged if they’re overcharged, but the batteries and chargers are usually designed to stop charging before that happens. So you don’t have to worry about unplugging your phone or laptop as soon as it’s charged.

And waiting until lithium-ion batteries are close to dead before charging them can make their lives up to 5 times shorter than always charging before they dip below 70%. The higher the charge before you plug in, the longer the battery will last.

With that said, if you have something that tells you how much time you have left on your battery, not just the percentage, you should fully discharge it about once a month to help the computer recalibrate its estimate.

But the biggest thing that affects all batteries is temperature. Electrochemical reactions happen faster when it’s hotter. So batteries do break down faster in prolonged heat. But that doesn’t mean you should store your batteries in the freezer.

The air in the freezer, or the bag with batteries in it you put in the freezer, has plenty of water vapor just waiting for a place to crystallize into ice. And you don’t want wet, icy batteries.

So if you want your phone and laptop batteries to last, keep them plugged in as much as possible. And no matter what kinds of batteries you’re storing, they’ll be just fine if you stick them in a drawer.

So many of the devices we use every day have batteries and it seems like everyone has their own rituals for making them last, some people store them in the fridge or unplug as soon as the battery’s charged or even insist on only charging when the batteries on the brink of dying but when it comes to charging the batteries and things like your phone and laptop it turns out that many of these strategies don’t do very much and some are actually counterproductive.

Batteries work using electrons that try to flow between electrodes but they’re blocked by an electrolyte which only lets charges flow when the two sides are directly connected by wires once all the electrons have reached the positive electrode the battery is considered discharged meaning it’s out of power recharging the battery just involves pushing those electrons back onto the negative electrode reset the whole process all rechargeable batteries lose the ability to hold a charge over time as the electrolyte breaks down and the pieces were out but what those pieces are made of determines a lot about how to make a battery last as long as possible.

A lot of those battery life myths you might hear apply to nickel cadmium and nickel metal hydride batteries the kind you might have in your TV remote with those because of the chemical reaction that produces the electrons it really is better to let them run all the way down before recharging them and to stop charging pretty much as soon as they’re fully charged otherwise crystals can form on the electrolyte and the batteries can break or at least not hold as much charge as they should but most portable devices these days like your phone or your laptop use lithium ion batteries which work differently.

Lithium ion batteries do get damaged if they’re overcharged but the batteries and chargers are usually designed to stop charging before that happens so you don’t have to worry about unplugging your phone or laptop as soon as it’s charged or waiting until lithium ion batteries are close to dead before charging them can actually make their lives up to five times shorter than always charging before they dip below 70%.

The higher the charge before you plug in the longer the battery will last that said if you have something that tells you how much time you have left on your battery, not just a percentage you should fully discharge it about once a month to help the computer recalibrate its estimate.

The biggest thing that affects all batteries is temperature, electrochemical reactions happen faster when it’s hotter so batteries do break down faster in prolonged heat but that doesn’t mean you should store your batteries in the freezer the air in your freezer, or in the bag with batteries in it you put in the freezer has plenty of water vapor just waiting for a place to crystallize into ice you really really don’t want wet icy batteries so if you want your phone and laptop batteries to last keep them plugged in as much as possible and no matter what kinds of batteries are storing they’ll be just fine if you stick them in a drawer there’s this idea going around that dead batteries will bounce when you drop them while brand new ones will bounce, and that’s not too far from the truth.

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