How to make a TTTT batter peak charger out of cellphone charger..

killer · #1 06-01-2003, 08:03 AM

:ö: here, i used this model because of it's led indicator that tells if your cellphone is already at full charge..

killer · #2 06-01-2003, 08:07 AM

if you have an old Li-ion cellphone battery, you could find a similar electronic board like this inside...

killer · #3 06-01-2003, 08:14 AM

Open your cellphone charger, then at the back of it's electronic board, using a voltmeter locate the 7+ volts output, then solder red wire on positive and black wire on the negative points..

killer · #4 06-01-2003, 08:25 AM

...

killer · #5 06-01-2003, 08:34 AM

shrink wrap or cover it electrical tape and find a space where the cellphone battery electronic circuit board to fit inside your charger.. always make sure that you use the correct color for the polarity.. red wire to positive and black wire to negative, this may reduce the risk of short circuit or reverse polarity and voila! you now have a TTTT peak charger, now if your cellphone charger don't have an L.E.D. indactor on it like the one i used here... you can use this thread to guide you on how long a certain battery will take to full charge using your cellphone charger.

http://www.tinyrc.com/forums/showthr...threadid=10616

here is my finished product... the led is red when charging, then led turns green when the battery is fully charged.

killer · #6 06-01-2003, 09:02 AM

as always......... there is warning everytime we deal with high voltage electronic equipment.

1. wear safety glasses when opening your cellphone charger unit.

2. use a thick rubber gloves or any insulated gloves to avoid electric shock, where dealing with a 110 or 220volts here, we need this during the process, specially when locating the 7+ volts at the cellphone charger circuit board. but if your charger already gives out 5 or 7volts and 500Mah (lower is fine) of power there's no need for you to open your cellphone charger unit.

3. if you are 13 years old and below, this mod is not for you, but hey you know your skills and capability, but remember, i will not be responsible for any accident or injury that may occur while doing this modification.

4.electricity do good things when handled properly, but if you handle carelessly, this may cause harm and even death.

-

squeegee · #7 06-01-2003, 09:18 AM

Quote:

3. if you are 13 years old and below, this mod is not for you, but hey you know your skills and capability, but remember, i will not be responsible for any accident or injury that may occur while doing this modification.

I qualified for this about 2 weeks ago.

YAY!

arch2b · #8 06-02-2003, 09:27 PM

killer,
you are simply amazing! the things you can do, a regular McGiver (tv show guy who could make a bazooka out a pen and chewing gum, that kind of stuff)

by chance do you have a model number for the charger and the battery you used? i'm sure i can pick these up at a flea market for almost nothing!

killer · #9 06-02-2003, 10:03 PM

:ö: aww man! being compared to my idol is the last thing i thought i would see/hear in this forum, i am not worthy, but hey, thanks Arch

...

The cellphone model charger i used here is a "MADAT-PHILIPS SAVVY" that's it, now if you look closely at first picture i believe the words though a bit blurred is still readable, now as far as i can remember the rectangular circuit board i used here came from a Li-Ion cellphone battery which i forgot the model... i'll visit the store where i bought it look for the model number

, but i know that most Li-ion cellphone battery have this electronic board.

-æ

arch2b · #10 06-02-2003, 10:22 PM

if there in most li batteries...i'll just pick up a few the flea market next weekend...i'll pick up a few chargers as well. can probably get several of both for $5.

arch2b · #11 06-05-2003, 07:54 AM

killer,
i was going through a box of junk last night and came across a motorola psm4604b li phone charger...
has an led display
output:
4.4v - 1.1a

and i found several motorola 3.6v li battery packs as well. are these of any use?

killer · #12 06-05-2003, 09:35 AM

Quote:

Originally posted by arch2b
killer,
i was going through a box of junk last night and came across a motorola psm4604b li phone charger...
has an led display
output:
4.4v - 1.1a

and i found several motorola 3.6v li battery packs as well. are these of any use?

:ö: The li phone charger you found would do, if you will try and test the output with your voltmeter, sometimes the output is a bit higher than what is written on the label, which is normal, because for you to charge a battery, you'll be needing a voltage higher than the voltage of the battery you are charging, but i'm quite skeptic with the 1.1Amp output...this will full charge your battery rapidly which may damage your cells, more of like a fast charger on 1/10 scale r/c... they can be used but not advisable to use it all the time, about the 3.6v li battery packs, try opening it's black plastic cover, this is a bit hard to do, because a very strong double sided tape holds the battery and the black hard casing together, then you'll see inside an electronic board connected to the li-ion battery, before removing the electronic board from the battery, note which point is connected to the + and - terminal of the li-ion, because this is where you will solder your charging jack, and the other side of the electronic board should be connected to the terminal output on the casing of the battery, identify which one is + and - , this is the part to be connected on the cellphone charger.

-æ

arch2b · #13 06-05-2003, 10:16 AM

ok, i'll keep looking around...i've had atleast 4 cell phones in the last 6 years so i'm bound to find another charger...

what output would you reccommend, so i can check what i find quickly...if 1.1a is too high? as you can guess, i'm very eager to charge my battery pack...then pray the electronics work!

killer · #14 06-06-2003, 03:37 AM

Quote:

Originally posted by arch2b
ok, i'll keep looking around...i've had atleast 4 cell phones in the last 6 years so i'm bound to find another charger...

what output would you reccommend, so i can check what i find quickly...if 1.1a is too high? as you can guess, i'm very eager to charge my battery pack...then pray the electronics work!

:ö: Arch, as far as i know, most cellphone charger have an output of 500+Mah at 4 or even higher voltage, but be sure to find a charger that have an output not more or less than 5 to 7volts and less than1Amp of power. But the lower the number on Amperage output, the longer your battery it will take to full charge, this is much safer for your battery than using a charger with more than 1Amp power.

-æ