[Lenny400] Coin cell on motherboard

[H. Nikolaus Schaller]

Hi David,

> Am 12.08.2017 um 01:27 schrieb David Boddie <david at boddie.org.uk>:
> 
> Having just opened up the Letux 400 (that was fun) to see if I could track
> down the serial pads, I discovered that it has a 3V CR 1220 Lithium Cell on
> the underside of the motherboard.

Ah, yes. This must be the backup battery for the RTC.

> 
> I haven't tested it yet and it doesn't look corroded but it might be
> something to bear in mind with all the others out there - or those still in
> stock.

So this means if RTC does not keep its state, the battery might need replacement.

> 
> David

Thanks and BR,
Nikolaus

PS: any progress on tracing down more JZ4730 documentation and user's manuals?