>> I dont think the BQ2057 chip is adequate for his application, i would say maybe the BQ2057W would be the choice here.
Quite right, the 2-cell 8.4V is the one we're after.
>> Are you talking about the diagram in post #31 ?
Something like that, yes.
>> I wouldnt mind looking into a non linear charge method for two cells in series either.
Maybe an SMPS in place of the pass transistor with the BQ2057W controlling the feedback... or something else completely...
Quite right, the 2-cell 8.4V is the one we're after.
>> Are you talking about the diagram in post #31 ?
Something like that, yes.
>> I wouldnt mind looking into a non linear charge method for two cells in series either.
Maybe an SMPS in place of the pass transistor with the BQ2057W controlling the feedback... or something else completely...