saptzae:
As to electronics in the same box, I prefer this over adding another box.
The wiring to it could not practically be protected.
In fact, you don't need another box. There's already a multipin connector
back to the charger and one would expect the battery sensing and management
electronics to be in the charger enclosure, not at the battery, where it's
vulnerable to cell leakage.
Imho, the only things that should be in the enclosure are the cells and
perhaps a small pcb supported by the connector, carrying inline fuses to
protect critical wiring.
We just might have to agree to differ on this one, but it all helps the
enquiry :-)...
Regards,
Chris