Charging batteries overnight

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skedji

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tnt56

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Sorry to be the party pooper. I just don't trust very many batteries to be left on the charger while I'm asleep. My computer and the iPhone are the only two that I trust. Guess I may be parinoid.(spelling?) I've heard of people that will leave them in an empty can when they charge them. I just figure better safe than sorry.
 

jimrug1

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Thanks for the replies! Like TNT I'm paranoid but I feel a little better about it now.

TnT is right. Better to be safe than sorry.

While I usually disconnect my twists when the charger light turns green, I have left them overnight on the charger numerous times without any consequence. I have a square of ceramic tile that I lay them on so if I fall asleep or forget about them, at least they are on something non flammable.
 

steelerfaninperu

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This depends a lot on the type of battery you have, most I believe are using Lithium Ion nowadays. Generally it's not a problem to leave it charged and plugged in, however excessive heat can degrade battery life, and being on the charger does mean it's exposed to heat for longer, unless your charger is smart and turns off on its own (most dont).

Lithium Ions are also designed to be used until they're dead, then charged full up. They have a finite amount of cycles, or charges, that you can do. So if you only use it halfway and charge it up again, you've used a cycle that wasn't fully taken advantage of if that makes sense. But Lithium Ion batteries don't really suffer from that 'memory effect' where they'll permanently lose capacity if you don't charge it correctly.

Ni-Cd batteries should not be left on chargers or they will be damaged after reaching full capacity.

In short, if its a lithium Ion, don't worry about it. Just try to use it all up before you charge it again, get the most out of your battery.

*source: Used to be a PC tech and had to constantly answer this question for laptop customers.
 

Caridwen

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Is this safe for an ego c twist? My batteries always seem to die at the most inconvenient moment. I just hope I have not ruined the life of my battery as I have done overnight charging only a few times.

Don't wait for your battery to die to charge them. They'll last longer if you don't and won't have to charge as long.
 

Caridwen

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This depends a lot on the type of battery you have, most I believe are using Lithium Ion nowadays. Generally it's not a problem to leave it charged and plugged in, however excessive heat can degrade battery life, and being on the charger does mean it's exposed to heat for longer, unless your charger is smart and turns off on its own (most dont).

Lithium Ions are also designed to be used until they're dead, then charged full up. They have a finite amount of cycles, or charges, that you can do. So if you only use it halfway and charge it up again, you've used a cycle that wasn't fully taken advantage of if that makes sense. But Lithium Ion batteries don't really suffer from that 'memory effect' where they'll permanently lose capacity if you don't charge it correctly.

Ni-Cd batteries should not be left on chargers or they will be damaged after reaching full capacity.

In short, if its a lithium Ion, don't worry about it. Just try to use it all up before you charge it again, get the most out of your battery.

*source: Used to be a PC tech and had to constantly answer this question for laptop customers.

How to Prolong Lithium-based Batteries - Battery University
 

LucidAce

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I may be overly cautious in this regard (and overly reckless in others), but I try to avoid leaving e-cig batteries of any kind charging longer than they need to be. Even if there is a protection circuit in place, when you leave it sitting on the charger after it's full you're basically going to be "banging up against" that protection circuit all night long "daring" it to fail just once, creating a potentially dangerous overcharge situation.
 
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yzer

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I'm perfectly comfortable with charging my batteries overnight. I give them a visual check before each charge and check voltage with a DMM before and after each charge.

LOL, hey it works for me...

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Heavyrocker

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It most likely wont harm the batts,but there is always a chance they could short circut and cause a fire,ive read play it safe and unplug them when lights are green.

How does one ensure safety when charging batteries?

first and foremost only used a charger designed for that specific battery. When in doubt, always follow the battery's manufacturer's recommendation;
never charge batteries unattended or overnight;
monitor charging. If the battery/ies or charger become unnecessarily hot ((read hot not warm, warm = OK, hot = NOT) (and warm is defined as slightly warm)), unplug the charger immediately, and remove the battery/ies from the charger, and investigate the cause;
charge batteries away from any flammable material, especially non protected LI Ion batteries. Although more folks are turning onto protected batteries, many still purchase un-protected cells. I believe this practice will continue for as long as manufacturers continue to make unprotected cells;
it is not recommended to charge:
batteries with differing chemistries simultaneously on the same charger;
it is not recommended to charge batteries with dissimilar voltages on the same charger. As a matter of fact, when it comes to voltages, only use the appropriate charger to charge batteries;
it is not recommended to charge same size batteries but with different "mAh" ratings together on a multi-channel charger simultaneously; and
it is not recommended to charge batteries from different manufacturers on the same charger at the same time.
Always charge batteries used in sets, as a set, and always charge batteries used in single applications as a single;
always remove batteries when the charger's light turns green. Batteries do not require a trickle charge, this is a practice that not only is unnecessary, prolonged charging will only result in a diminished lifespan of the cell itself;
should one battery charge quicker than another remove the battery from the charger. Take note of this, as this is an indication that either the battery's internal resistance is greater than the other battery in the set, or that that particular battery was depleted further than its counterpart. Although, it is normal for batteries from the same set to charge quicker than one another, large discrepancies in charging times are to be treated with caution. As once again the batteries and or charger could be at fault. A quick cheek prior to charging should have indicated this, if not change channels during next re-charge and see if indeed it is the battery or the charger's channel that may be charging slightly slower.



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