Question about Battery Charger Model UT-1298

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Question about Battery Charger Model UT-1298

Postby BARMAN2005 » Wed Jun 27, 2007 6:02 am

Hello

I have question about my Battery Charger, Model UT-1298. Photo from shop:
Image
Image
Another photo from net:
Image

When I charge my battery indicator LED is illuminates red, but when battery is load full then LED will stop illuminates?

From:
http://unitechbatt.en.alibaba.com/offer ... 1298_.html
http://global-business-center.com/p244,Charger_(UT-1298).php

5) Build in microprocessor controller with auto stop function
6) Automatically switching from charging to trickle charging in the end
7) Two LED display indicating charge status


When battery is load full then LED will stop illuminates? In instruction of my Battery Charger I can't find anything about microprocessor controller with auto stop function... This is the same Model of the Battery Charger. :/

It will stop loading when battery is full and LED display indicating charge status will not illuminates? Thanks.

Bye

PS: I'm charge now!... :)
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Postby Banana » Wed Jun 27, 2007 1:08 pm

There are different battery charger types:

- "Intelligent" chargers that always monitor the voltage, heat or other parameters to determine when the battery is charged. Those one usually are expensive.
- Timer chargers. Those one just have a timer in them and stop charging after a certain amount of time. Very bad for batteries because either too much or not enough charging (especially if you use other batteries than provided).
- Trickle chargers. Stupid, cheap chargers. They shouldn't damage your batteries if used correctly, but they are very slow (about a whole day for high capacity battery).

Yours is one of the first type according to your first link (assuming you are 100% sure it is the same model and not just look similar). So just put in batteries and leave them in the charger until you need them.

Only use NiMH batteries, no NiCD!
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Postby BARMAN2005 » Wed Jun 27, 2007 2:52 pm

Banana wrote:...Yours is one of the first type according to your first link (assuming you are 100% sure it is the same model and not just look similar). So just put in batteries and leave them in the charger until you need them.

Only use NiMH batteries, no NiCD!...

I'm sure, this is the same Battery Charger. I use NiMH battery for my mp3, so this is ok. Thanks. :)

One once question:
When battery is full then LED won't illuminates?

PS: Here you can find shop - I buy there Mp3 and Battery Charger:
http://www.positivo.pl/sklep/13987.xml?cat=1637
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Postby Banana » Wed Jun 27, 2007 3:06 pm

Usually it is the way it works. Or maybe the light get from red to green ...
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Postby BARMAN2005 » Wed Jun 27, 2007 3:07 pm

Banana wrote:Usually it is the way it works. Or maybe the light get from red to green ...

I think so but LED always illuminates red... :P

I found in instruction something what can help someone:

How many time I should load my battery?
capacity of the battery x 1.4 : 60 = charge time of the battery
Example, my batery capacity is 800mAh.
800 x 1.4 : 60 = 18
I must load my battery 18 hours. :)
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Postby Banana » Thu Jun 28, 2007 8:48 am

Your formula is to specific (only some chargers with little charging current. I found this:
How long will it take a charger to charge batteries?

It's pretty easy to estimate how long it will take. Simply divide the capacity of the battery by the charge rate of the charger, then increase the amount of time by about 20% to allow for a certain amount of inefficiency. As an example, a battery with a capacity of 1600 mAh will require about 4 hours to be fully charged by a charger with a charge rate of 500 mA. (1600 mAh/500 mA x120%). Incidentally, this example would apply to a standard AA NiMH battery and a typical "rapid charger". Keep in mind that a battery that is only partially discharged will be recharged in less time.

If this seems too complicated, please use our Battery charge-time calculator.


From: http://www.greenbatteries.com/bachfa.html#How%20long%20to%20recharge

Does your LED ever extinct or is it always on?
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Postby Banana » Thu Jun 28, 2007 8:58 am

Is this your charger http://www.greenbatteries.com/basiccharger.html ?

If yes it is only a trickle charger (see type 3 of my first post). Charging time is about 15 hours but it's not considered harmfull if your batteries stayed longer in the charger (if not exagerated, of course). LED will never go off in this type of charger, it always continue to charge.
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Postby BARMAN2005 » Thu Jun 28, 2007 5:53 pm

Banana wrote:Is this your charger http://www.greenbatteries.com/basiccharger.html ?...

No. This is my charger: http://www.positivo.pl/upload/wysiwyg/p ... rki_04.jpg

Charger calculator: :)
http://www.greenbatteries.com/batterycalc.html

Banana wrote:...Does your LED ever extinct or is it always on?

It is always on, LED light is always on.
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Postby Banana » Thu Jun 28, 2007 6:06 pm

Strange. Following calculator it should take 1.2 hours, then LED should extinct ...

It's the way it works for my charger and all others I saw at least (except trickle charger).

I just found this!?

http://judycdj.en.ec21.com/product_deta ... ry_Charger

It's your model (UT-1298), but this time it says:
LED indicating properly charge
Charge current: 150MA for AA, 80MA for AAA battery
suitable for 2/4pcsAA/AAA 1.2V Ni-Mh/Ni-cd


What's up? Why charge current changed from 800mA to 80 and 150 mA respectively? And it says nothing about microprocessor, unlike other chargers :evil:
Last edited by Banana on Thu Jun 28, 2007 6:18 pm, edited 1 time in total.
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Postby BARMAN2005 » Thu Jun 28, 2007 6:17 pm

:roll:

1h?! and battery is load? :\ I load my battery 15h... In instruction Battery Charger I found table and there is info about NiCD battery - it should load 14h.

I don't understand, how you can load battery to full in 1h?
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Postby Banana » Thu Jun 28, 2007 6:33 pm

It's a fast charger. It has high charging current (reason why microprocessor is needed, batteries get hot when charging this fast). Yes, it loads 800mAh AAA batteries in quite exactly an hour :D
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Postby BARMAN2005 » Thu Jun 28, 2007 7:26 pm

:shock: Wow, I will next time try load my battery only 1 hour... (strange in instruction I found that I should load my battery 14h... very strange)
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Postby Banana » Fri Jun 29, 2007 7:05 am

You must have a special charger for charging in one hour (I refered to the one I have in my last post). Those chargers have high charging current. Yours seems to be a trickle charger, those only have little charging current, therefor it takes a long time to charge the battery.

I've looked it up, my charger has a charging current of 800mA while yours seems to have 80mA for AAA batteries each.
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Postby BARMAN2005 » Fri Jun 29, 2007 7:53 pm

Banana wrote:You must have a special charger for charging in one hour (I refered to the one I have in my last post). Those chargers have high charging current. Yours seems to be a trickle charger, those only have little charging current, therefor it takes a long time to charge the battery...

It can't be a trickle charger... Oh, but here I see that charger have 800mA for AA/AAA batteries, mine have 80MA... :/
http://unitechbatt.en.alibaba.com/offer ... 1298_.html

Banana wrote:...I've looked it up, my charger has a charging current of 800mA while yours seems to have 80mA for AAA batteries each.

Yes, this is true... :(

Anyway... Important, that it acts and can load battery.

Banana wrote:http://judycdj.en.ec21.com/product_detail.jsp?group_id=GC01530836&product_id=CA01530866&product_nm=Battery_Charger

It's your model (UT-1298), but this time it says:
LED indicating properly charge
Charge current: 150MA for AA, 80MA for AAA battery
suitable for 2/4pcsAA/AAA 1.2V Ni-Mh/Ni-cd


What's up? Why charge current changed from 800mA to 80 and 150 mA respectively? And it says nothing about microprocessor, unlike other chargers :evil:

So, this is my charger... :(
http://www.unitechbatt.com/proi/cn/prod ... ductid=261
This is "Low cost version" :\
Last edited by BARMAN2005 on Sat Jun 30, 2007 8:05 am, edited 1 time in total.
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Postby Banana » Sat Jun 30, 2007 8:05 am

If charging current is 80mA (or charger has 14 hours for 800mAh batteries) then it is a trickle charger. Those work fine by the way, they are just slow, that's all.
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