# What are the 8 wires on this rechargeable lithium-ion battery?

I am trying to replace a rechargeable lithium ion battery with one that has a longer lifespan when charged. The one I have has 8 wires, but every one I find has 2. It has 3 red, 3 black, 1 yellow, and 1 white.

As you can see: Rating: 3.7V 2200mAh

Can I replace it with something like this 6000mAh one, from SparkFun? https://www.sparkfun.com/products/8484

Thanks, guys!

• Open it and figure it out – PlasmaHH May 30 '16 at 13:51
• That's why I'm asking you guys. I don't have a replacement one. – HTDE May 30 '16 at 13:52
• "The one I have has 8 wires" it seems you have the one you have to open, don't you? – PlasmaHH May 30 '16 at 13:55
• The reds are positive, blacks are negative (it says so on the label). I'm guessing that the white and yellow ones are connected to a temperature sensor or other monitoring sensor. – Dampmaskin May 30 '16 at 13:58
• Ok, that makes sense. What I don't get still is why there are 3 of each kind of terminal, instead of one. Can I convert them? – HTDE May 30 '16 at 14:01

From the color code of the wires it's obvious that you have 3x B- and 3x B+ on the sides. The schematic in the datasheet suggests that the two wires in the middle are P- and NTC, for temperature sensing.