Support Required for 40 mAh Battery Configuration with nPM1300 EK and nRF54L15

[Buttefly]

Hello Nordic Team,

I am currently working with the nPM1300 EK together with the nRF54L15 platform and a custom 40 mAh Li-Po battery.

I am facing an issue while configuring battery charging and discharging parameters in nPM PowerUP v2.2.4. The tool currently provides a minimum battery capacity option of 400 mAh, and I am unable to configure or generate settings for a 40 mAh battery.

I would appreciate your guidance on the following points:

1. How to create a valid battery profile .inc file for a 40 mAh Li-Po battery.
2. Recommended charger configuration values for:
   1. Charge current
   2. Termination current
   3. Cutoff voltage
3. Whether it is possible to use the fuel gauge functionality without the dedicated nPM Fuel Gauge Board.
   Recommended approach for performing charge/discharge testing and SOC estimation using only:
   1. nPM1300 EK
   2. nRF54L15
   3. 40 mAh battery
4. Any available examples or documentation for low-capacity batteries (<100 mAh) with nPM1300.

Current setup:

• nPM1300 EK
• nRF54L15
• 40 mAh Li-Po battery
• NCS SDK v3.2.0
• nPM PowerUP v2.2.4

At the moment, I do not have the nPM Fuel Gauge Board available, so I would also like to understand the limitations and supported workflow without it.

Thank you for your support.

[Tharaka]

Hi, 

For the best accuracy it is recommended to profile your own battery with nPM PowerUP and nPM-EK. 

You can also find some generic pre-profiled battery models (for this capacity range) under nPM1304 Virtual Device for early evaluations






You can save the model as a .inc and use with you application. 
For more info. Using pre-profiled battery models


Recommended charger configuration settings depends on your battery specifications annd datasheet. Battery model is just for fuel gauging and it does not configure any charger or PMIC parameter. You need to refer the battery datasheet and configure the parameters. 

Regards
Tharaka