Battery charging question

Shrapnel[Op-For] · September 27th, 2007, 20:59

As we speak my 8.4v battery is charging. It is plugged into a voltage converter (its from overseas) and started charging about an hour ago. I searched the forums for answers, and look at the "battery FAQ" but i am having trouble figuring out how to calculate the time to charge the battery. Here is the info on the battery:

Input: AC 220v 50/60 hz

Output: DC 8.4v 250 ma

And the battery says its 1.2v each, and 1300ma.

Any help on how long it will take to charge, or how to figure out how long it will take is much apreaciated. Also, this is the first time this battery will be charged.

Skladfin · September 27th, 2007, 21:04

5~6 hours. If the out put is 250mah

Regan.S · September 27th, 2007, 21:36

Probably around 5-6 hours like Skladfin mentioned but don't suspect it to be completely charged by then. For some reason it takes all the batterys I get around 12 hours for no appearent reason

Greylocks · September 27th, 2007, 21:53

Your charger is 220 volt? Your outlet at home is 110 volts. See a problem here?

If your converter does work, just divide your battery's amperage by the amperage of the charger.

Like in the FAQ, it's highly suggested to get a decent guess-proof charger.

dodger_me · September 27th, 2007, 22:09

Geylocks you mean MAH right?

Shrapnel[Op-For] · September 28th, 2007, 01:28

so if i calculated it right.. it should take 6.5 hours?

Skladfin · September 28th, 2007, 01:32

How the hell did you get that number...

1300 divided by 250 = 5.2 hours = 5 hours and 15min approx.

Are you failing math course or what.

Mantelope · September 28th, 2007, 01:34

A charger that puts out 8.4V isn't going to charge an 8.4V battery.

Skladfin · September 28th, 2007, 01:38

Quote:

Originally Posted by Mantelope

A charger that puts out 8.4V isn't going to charge an 8.4V battery.

What the hell are you talking about...

I think you have it confused with the input.

Output value of the charger IS the voltage of the battery.

Anyone tried charging an 8.4v with 120v charger =)?

kalnaren · September 28th, 2007, 01:50

Quote:

Originally Posted by Skladfin

What the hell are you talking about...

I think you have it confused with the input.

Output value of the charger IS the voltage of the battery.

Anyone tried charging an 8.4v with 120v charger =)?

Most chargers I've seen that charge an 8.4v battery put out between 9 and 13 volts. Otherwise the battery would be "pushing back" with the same force that the charger is using, and hence no charge. Am I wrong? (I know this is very simplified... but yea...)

Mantelope · September 28th, 2007, 01:55

No, you're right. 8.4V is how much the battery will put out when it's 100% drained... If you're going to charge it, you need to apply a greater potential difference in order for the chemistry to actually store a charge.

Shrapnel[Op-For] · September 28th, 2007, 02:43

Took the battery of the charger. Works great, but because i didn't want to annoy people and start a new thread.. when my gun in on semi auto, i can hold down the trigger, and it shoots one, and then one, like normal, but then, after the third shot, it shoots on full auto.. I don't know why, but has anyone experienced this with their guns before? (my guns a jg m4a1 btw)

Styrak · September 28th, 2007, 03:15

Quote:

Originally Posted by Mantelope

No, you're right. 8.4V is how much the battery will put out when it's 100% drained... If you're going to charge it, you need to apply a greater potential difference in order for the chemistry to actually store a charge.

This is true. My charger pushes around 10-10.5v charging my 8.4v battery.

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

September 27th, 2007, 20:59	#1
Shrapnel[Op-For] Trader rating Join Date: Sep 2007 Location: Richmond B.C	Battery charging question As we speak my 8.4v battery is charging. It is plugged into a voltage converter (its from overseas) and started charging about an hour ago. I searched the forums for answers, and look at the "battery FAQ" but i am having trouble figuring out how to calculate the time to charge the battery. Here is the info on the battery: Input: AC 220v 50/60 hz Output: DC 8.4v 250 ma And the battery says its 1.2v each, and 1300ma. Any help on how long it will take to charge, or how to figure out how long it will take is much apreaciated. Also, this is the first time this battery will be charged.

September 27th, 2007, 21:36	#3
Regan.S Trader rating Join Date: Aug 2007 Location: Saskatchewan, I'm Lovin' It	Probably around 5-6 hours like Skladfin mentioned but don't suspect it to be completely charged by then. For some reason it takes all the batterys I get around 12 hours for no appearent reason __________________ Originally Posted by Forever_kaos ... Buy her flowers, say I'm sorry to hear your dog/cat died last night... she asks - What you talking about? you say - I herd something wailing like crazy Might piss her off but the flowers will be nice... Originally Posted by Penguin View Post ... I miss the days where someone would say "I am so depressed, I'm going to kill myself" and 12 consecutive posters would basically say "do it, and stop wasting our time".

September 28th, 2007, 01:34	#8
Mantelope Scotty aka harleyb Trader rating Join Date: Mar 2004 Location: Toronto, Ontario	A charger that puts out 8.4V isn't going to charge an 8.4V battery. __________________

September 27th, 2007, 21:04	#2
Skladfin Trader rating Join Date: Dec 2006 Location: Glace Bay, Nova Scotia	5~6 hours. If the out put is 250mah

September 27th, 2007, 21:53	#4
Greylocks Trader rating Join Date: Dec 2001 Location: Gatineau, Quebec (Near Ottawa)	Your charger is 220 volt? Your outlet at home is 110 volts. See a problem here? If your converter does work, just divide your battery's amperage by the amperage of the charger. Like in the FAQ, it's highly suggested to get a decent guess-proof charger.

September 28th, 2007, 01:28	#6
Shrapnel[Op-For] Trader rating Join Date: Sep 2007 Location: Richmond B.C	so if i calculated it right.. it should take 6.5 hours?

September 28th, 2007, 01:32	#7
Skladfin Trader rating Join Date: Dec 2006 Location: Glace Bay, Nova Scotia	How the hell did you get that number... 1300 divided by 250 = 5.2 hours = 5 hours and 15min approx. Are you failing math course or what.

September 28th, 2007, 01:55	#11
Mantelope Scotty aka harleyb Trader rating Join Date: Mar 2004 Location: Toronto, Ontario	No, you're right. 8.4V is how much the battery will put out when it's 100% drained... If you're going to charge it, you need to apply a greater potential difference in order for the chemistry to actually store a charge. __________________

September 28th, 2007, 02:43	#12
Shrapnel[Op-For] Trader rating Join Date: Sep 2007 Location: Richmond B.C	Took the battery of the charger. Works great, but because i didn't want to annoy people and start a new thread.. when my gun in on semi auto, i can hold down the trigger, and it shoots one, and then one, like normal, but then, after the third shot, it shoots on full auto.. I don't know why, but has anyone experienced this with their guns before? (my guns a jg m4a1 btw)

Battery charging question

General