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:
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The device uses an nRF54L15 running at 3 V.
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It runs a Matter project as an end device in light mode.
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It must be battery-powered.
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Current consumption during sleep is 6.67 µA.
- 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.