Li-ion Charger SKU 333013 charging ML2032 at 2mA with 3.3V input

TECHNICAL SUPPORT Batteries & Power
1

Customer:

I’m looking at this charger module to integrate into a design to charge a ML2032 3V battery, but I need a max output of 2mA. I know on other modules I can swap out a resistor to 33k to get the 2mA output. Can the same be done with this one, if so which resistor and what value? Also is the operating voltage 5V or can it be 3.3V?

Originally submitted via email support on 17 June 2025. Migrated to the forum for community visibility.

2

Soldered Support:

Check out the HW files for this charger: GitHub - SolderedElectronics/Li-ion-charger-hardware-design: Hardware design, BOM, gerbers and 3D files for Li-ion-charger designed by Soldered Electronics. · GitHub

It contains the TP4056 IC for charging. Based on the IC and schematic, it’s up to you to evaluate if this is possible to accomplish by changing the resistor, but we don’t officially support it.