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4 pins with unknown polarity, i want to charge a battery with it?

So I have 4 pins with unknown polarity, and a rechargeable battery with 2 pin with known polarity, and i got a multimeter.

How am i going to solve this?

I randomly did something and it worked, but it did not charge, but it could use the battery, but now its empty it cant anymore.
layout used is --++

please help :)

Picture of 4 pins with unknown polarity, i want to charge a battery with it?
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lhu (author) 5 years ago
ok here is the pciture which will clear up any misunderstnadings

red = 1st cable
black = 2nd cable
yellow = 3rd cable
green = 4th cable,


connected order is
--++

this order lets me to use the battery but does not let me recharge the battery with the power from the calc that comes from the USB
IMAG0331.jpg
lhu (author)  lhu5 years ago
higherquality : http://img41.imageshack.us/img41/1633/imag0331t.jpg
lhu (author) 5 years ago
the cables are soldered on by me on random order ! as i did not know the polarity and still not know for sure.

with yellow black on postive
and green red on negative i get a reading that changes from 100mv to 2v?
iceng lhu5 years ago
Again
lhu (author)  iceng5 years ago
ye sthe source and yes
iceng lhu5 years ago
What is the source ?
lhu (author)  iceng5 years ago
that doesnt matter does it?
its a calculator
lhu (author) 5 years ago

okay let me rephrase it:
it is a electronic that can use rechargeable batteries, which has a connector with 4 pins( 4 cables you see came from there).
The battery wasnt for sale in my country to I found a battery with same Voltage 3.7 but higher mAh, the battery got 2 connections, a + and -

order:
red = 1st cable
black = 2nd cable
yellow = 3rd cable
green = 4th cable,

If you connect on
to the minus red and black, and on the positive side of the battery yellow and green, it works can use the battery but the recharging function doesnt work. the battery i found was a DS lite battery, and those should be able to charged right?
so I wondered if it might be the order of the connections which why it doesnt charge?
rickharris5 years ago
To charge your battery safely you need a voltage above the battery voltage AND some way to control the current flow.

Connecting things haphazardly isn't a really good idea.
Re-design5 years ago
Looks like phone wires to me. Don't try to use these for other than the intended purpose. When it rings you get +- 90 volts.