Need advise on charging Li-Ion battery

[Jouellet]

Hi folks,

I bought a couple of these:
http://www.ebay.com/itm/121845454110?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

and a couple of these:
http://www.ebay.com/itm/351633458803?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

my need is to put 2 batteries in serial, in parallel with 2 more. (2x2 arrangement: 7.4V, double capacity)

I'm planning on using one of the charger module, so here are my questions:

#1: Since batteries are 3.7 volts, does the module needs to be fed with 7.4 Volts or a higher value should do: module would regulate the voltage ?

#2: Can I use 1 module to charge the 2x2 arrangement, or do I need 1 module per serial pair ?

thanks

 

[Alec_t]

The charger module datasheet should specify the input voltage range.

 

[Jouellet]

Alec_t: if you find the proper datasheet, let me know !

 

[Colin Mitchell]

You can really only charge 1 cell at a time. The charger only charges 1 cell at a time.
You will have to add a switch to separate the parallel cells.