Does the OpenWrt One ship with RTC battery when bought fully assembled?

Hardware Questions and Recommendations
1

I bought the fully assembled version from the link posted on the OpenWrt One page at OpenWrt website. Does the OpenWrt One wireless router RTC clock come with a battery built in in the assembled version. Or does the fully assembled version not have a battery installed in the RTC clock? If I have to install a battery, which side does positive face up or down.

2

CR1220 battery commonly seen in hearing aids sells for under one dollar. You have to check in shop's page how fully assembled the goods are.

3

Mine (full assembled version) came without a battery (but IIRC nobody claimed that the battery would be included, so I was not surprised).

Good question, I do not recall, however inserting it did not cause any question for me and was completely non-memorable...

4

Fairly obvious embossed labels face the skies as the positive lead is on the side of battery cylinder.

5

Shipping goods internationally with batteries is complicated, leaving the battery socket empty eases that up considerably.

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6

I’ve ordered two batteries from Batteries Plus store for my two OpenWrt One wireless routers. Shouldn’t be too hard to install them. I’ve already watched YouTube videos on OpenWrt One disassembly and it looks very easy. Thank you everyone for your replies.

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7

I recently bought one of these from a supermarket for around 6-7 australian dollars. Not saying every supermarket has them, but i'd be pretty confident saying any supermarket with a large floor space probably has them.

8

I installed the battery, but the logs say the below. Should I be concerned. The battery is new and with an expiration date of 2032. This was first boot with the battery, would subsequent boots not show this message?

Fri Mar  7 12:42:42 2025 kern.err kernel: [   13.631992] rtc-pcf8563 0-0051: low voltage detected, date/time is not reliable.
Fri Mar  7 12:42:42 2025 kern.info kernel: [   13.639511] rtc-pcf8563 0-0051: registered as rtc0
Fri Mar  7 12:42:42 2025 kern.err kernel: [   13.645561] rtc-pcf8563 0-0051: low voltage detected, date/time is not reliable.
Fri Mar  7 12:42:42 2025 kern.err kernel: [   13.653036] rtc-pcf8563 0-0051: hctosys: unable to read the hardware clock


[   13.631992] rtc-pcf8563 0-0051: low voltage detected, date/time is not reliable.
[   13.639511] rtc-pcf8563 0-0051: registered as rtc0
[   13.645561] rtc-pcf8563 0-0051: low voltage detected, date/time is not reliable.
[   13.653036] rtc-pcf8563 0-0051: hctosys: unable to read the hardware clock
9

Likely it was never set before?

10

Mmmh I only see this n dmesg:

[   18.071286] rtc-pcf8563 0-0051: registered as rtc0
[   18.089783] rtc-pcf8563 0-0051: setting system clock to 2025-02-05T08:14:41 UTC (1738743281)

in the log, but I installed the battery weeks ago set the time from the GUI and since then updated to 24.10.0 and rebooted several times....

11

I rebooted and RTC set the clock correctly. All is well. When you first boot after installing the battery for the first time you may see those messages, you can probably ignore those. Just reboot and check if RTC sets the clock like mine did.

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