Did I kill my battery?

[NickPoole]

Yesterday I plugged my 8.4v/1100mah mini in for its 7 hour charge , put it in at 4 in the afternoon and ment to take it out at 11. I went over to a buddys for the night though and totally forgot about the damn thing. I unplugged it at about 1 in the afternoon today when I got home so It's way overcharged , I just need to know If this Is going to kill it or not

[mike909]

Originally Posted by NickPoole

Yesterday I plugged my 8.4v/1100mah mini in for its 7 hour charge , put it in at 4 in the afternoon and ment to take it out at 11. I went over to a buddys for the night though and totally forgot about the damn thing. I unplugged it at about 1 in the afternoon today when I got home so It's way overcharged , I just need to know If this Is going to kill it or not

Well, consider yourself lucky. Overcharged batterys can catch fire and burn down your home. I was shown a battery which was a few hours over charged and all the plastic covering was black and all cut up.

[NickPoole]

Yea When I remembered I was really concerned and got home quickly, luckily It didnt catch fire. The battery appears fine externally though , I just need to know if Its still safe to use.

[mike909]

Why dont you just try a quick shot with your least favorite gun

[NickPoole]

Ive only got one gun

[Dusti69]

ive left my batteries charging all night before and they still work. theyve only gotten slightly warm to the touch

[mcguyver]

A dead battery is not going to kill your gun. Put it in the gun and try it. Don't worry.

[666]

Get a decent charger that will stop once the battery is charged to specified capacity. I would never trust one of those "non smart" chargers after seeing two of them go up in smoke.

[Azathoth]

+1 get a smart charger.

[tony123]

just throwing this out there but a good cheap smart charger that works great would be the superbrain 959. i have one of these for my rc stuff and it works great. Goes for about 50$ on ebay so wont burn the pocket either.

[Manni]

Wow i was just reading so ill post some information so you can read it..

The below info is only true if your battery still works and you didnt completely fry the inside of it of course.

Here is the info:

There _is_ an effect which can mimic the "memory effect", in the
sense that it makes the battery look as if it is losing capacity.
This effect, known as "voltage depression", occurs if you
over-charge a battery. The battery's output voltage drops from
1.2 to about 1.05 volts partway through the discharge cycle, and
this may "spoof" a power-monitoring circuit into believing that
the battery is exhausted.

Voltage depression is curable. It can be cured by fully
discharging each cell of the battery... INDIVIDUALLY... all the
way to zero, and then recharging the battery. You can do this if
the battery design allows you to access the individual cells. You
can't do it if you can't get to the individual cells, but only to
the battery terminals.

Alternatively, you can discharge the entire battery until the
total voltage drops to 1.0 volts per cell, and then recharge
it... do NOT try to discharge the battery all the way to zero, or
you will very probably damage it. This 1.0-volt-per-cell shutoff
should be safe (in particular, it leaves a good safely margin for
any battery rated at a nominal output voltage of 6.0 or less) and
should discharge all of the cells well past the
voltage-depression point.

[AIRSOFT FREAK]

Originally Posted by Manni

Wow i was just reading so ill post some information so you can read it..

The below info is only true if your battery still works and you didnt completely fry the inside of it of course.

Here is the info:

There _is_ an effect which can mimic the "memory effect", in the
sense that it makes the battery look as if it is losing capacity.
This effect, known as "voltage depression", occurs if you
over-charge a battery. The battery's output voltage drops from
1.2 to about 1.05 volts partway through the discharge cycle, and
this may "spoof" a power-monitoring circuit into believing that
the battery is exhausted.

Voltage depression is curable. It can be cured by fully
discharging each cell of the battery... INDIVIDUALLY... all the
way to zero, and then recharging the battery. You can do this if
the battery design allows you to access the individual cells. You
can't do it if you can't get to the individual cells, but only to
the battery terminals.

Alternatively, you can discharge the entire battery until the
total voltage drops to 1.0 volts per cell, and then recharge
it... do NOT try to discharge the battery all the way to zero, or
you will very probably damage it. This 1.0-volt-per-cell shutoff
should be safe (in particular, it leaves a good safely margin for
any battery rated at a nominal output voltage of 6.0 or less) and
should discharge all of the cells well past the
voltage-depression point.

alot of the new battery have the technolgy in them so the memory affect will not ocour if my sources are incorrect let me know thanks

[Harbinger of Darkness]

NiCd (nickel cadmium) batteries will suffer from the "memory effect", NiMH (nickel-metal hydride) and any lithium batteries will not suffer the "memory effect". All rechargeable batteries have a finite lifespan and will slowly lose storage capacity as they age due to secondary chemical reactions within the battery whether it is used or not. Lithium ion batteries can lose 5%-20% of their storage capacity every year from the time of manufacture. All rechargeable batteries have a finite number of charge/discharge cycles and will lose a very small amount of storage capacity during each cycle. Typically, rechargeable batteries are rated for hundreds or thousands of cycles.