Charging 2S li-ion batteries using TP5100 to lower voltage

[Sulfate9859]

Hello, I have a TP5100 charger and want to charge a 2S battery pack to lower voltage to extend the lifespan of the batteries.
I've seen some people on this forum suggest adding a schottky diode in series with the charger to introduce a voltage drop in the charging voltage thus lowering the voltage among the batteries. I'm wondering if that would work since I don't understand how would the charger be able to sense the battery voltage if there is a diode in the path? Thanks for the help.

Here is the schematic of how I would wire it all up (there's also under-voltage protection before the load):
EDIT: I just noticed I drew some wires wrong, fixed now

[tunk]

I guess it doesn't sense the battery voltage, only the output
voltage from the TP5100. Also, the balancer may not work
with this setup.

[Siwastaja]

Diode is indeed not a good idea. Instead, use another charger IC, one with lower charge voltage option available; or one without internal feedback resistor network (so that it requires two external resistors to configure the output voltage); or one with digital control interface.

[Sulfate9859]

Diode is indeed not a good idea. Instead, use another charger IC, one with lower charge voltage option available; or one without internal feedback resistor network (so that it requires two external resistors to configure the output voltage); or one with digital control interface.

Thanks, I just ended up charging it to the full voltage to avoid problems... But If I wanted to redo it in the future, which charging chip/board would you suggest me to use?