Raspberry Pi 5 – RTC Rechargeable Lithium Battery Holder (Battery Not Included)
This compact holder allows you to add a rechargeable lithium backup battery to the Raspberry Pi 5's real-time clock (RTC) header (J5/BAT), ensuring uninterrupted timekeeping during power outages.
Key Specifications
- Compatible Board: Raspberry Pi 5 (features built-in RTC and charging circuitry)
- Battery Type: Supports LIR2032 rechargeable or CR2032 non-rechargeable coin cells (battery not included)
- Connector: 2-pin SH‑1.0 mm JST plug, pre-fitted cable to fit J5 “BAT” header
- Cable Length: Approximately 150 mm wired lead
- Holder Material: Durable ABS plastic housing
Function & Performance
- Automatic Switching: Internal power-management IC switches to backup battery when main VCC is lost, and recharges it when power resumes — charging disabled by default and must be enabled via dtoverlay=rtc-bbat-vchg in config.txt
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Battery Nominal Capacity:
- LIR2032 rechargeable: ~45 mAh (Panasonic ML-series)
- CR2032 non-rechargeable: up to ~235 mAh—but non-rechargeable and requires protective diode if charging is active
- Backup Duration: Estimated 6 months of RTC retention without power
Environmental & Usage Details
- Installation: Plug the JST connector into J5/BAT header located next to the USB-C power input on Raspberry Pi 5
- No Configuration Required: With non-rechargeable CR2032, works instantly; rechargeable LIR2032 requires enabling the charger in config
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Typical Use Cases:
- Maintaining system time during power outages or boot-up
- Enabling scheduled wake-up / timed-on tasks
- Useful for offline data loggers, time-sensitive applications, and reliable timestamping
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