Request for Optimal Battery Solution for nRF54L15 Matter End Device

[IOANNIS0]

Subject: Request for Optimal Battery Solution for nRF54L15 Matter End Device

Hello DevZone Team,

I am opening this ticket to identify the optimal power solution for my nRF54L15-based device. Below are the project specifications:

1. The device uses an nRF54L15 running at 3 V.

2. It runs a Matter project as an end device in light mode.

3. It must be battery-powered.

4. Current consumption during sleep is 6.67 µA.

5. Precise fuel gauge indication.

Question: Which battery type would maximize operating time — primary or secondary — taking into account the self-discharge characteristics of rechargeable batteries?

From my  tests, I found that when using a rechargeable battery with  the nPM1300, the self-discharge phenomenon would draw the battery significantly faster than my load current, resulting in a maximum battery life of approximately 3 years maximum.

Conversely, if I use a standard battery with the nPM2100, such as a CR2032, the capacity is too small. I have therefore arrived at the CR123A as a possible candidate but there is not battery model for this battery type.

I would appreciate your guidance on the most suitable battery chemistry and PMIC combination for this application.

Thank you in advance for your support.

Best regards.

[Nissanth]

Hi, 

Primary battery is the better choice for your application. I would recommend the nPM2100 with a CR123A. You can use the existing CR2032 model, since It supports all lithium manganese CR-series batteries. 

Best regards,
Nissanth Karunanithy