[SimpleJoe]

After making a complicated circuit (well for me atleast) to trip a relay circuit to avoid over discharging li-ion batteries, i have found myself in need of a similar circuit for another portable speaker (i am currently thinking a 4S system and the draw should be no more than 2 amps) I know there are premade models such as:
http://www.aliexpress.com/item/4S-3...10&btsid=de2c9055-3a42-4f3c-9391-67a8116a0003
and
http://www.banggood.com/4A-5A-4-Str...m-Battery-Cell-Protection-Board-p-984596.html
My questions are on the charging side of this circuit.
Do they accept a wide input voltage or will i have to regulate the input voltage closer to the 16.4V?
Do they balance charge the cells as well?
And finally are they worth it or am i going to be left with a pile of smouldering electronics and a sad look on my face?

Thanks in advanced for any help,

SimpleJoe

 

[Alec_t]

Have you asked the seller for the info?

 

[SimpleJoe]

I have tried but i am unsure whether it is a language barrier or if they are just a bulk seller with no real knowledge of their stock but i cannot get the information i need.

 

[BobK]

It is not clear at all to me whether this interracts with a charger or includes the charger.

Bob