Tiny RTC DS1307 + 24C32 Real Time Clock Module (HCMODU0011)

[advocas]

Hi

I have just received one of these (HCMODU0011), it came with a CR2032 (non-rechargeable battery), looking at the picture it shows an LIR2032 (rechargeable battery) so I presume there is a charging circuit on board in which case there is a risk of overheating the CR2032 if it's being charged.

Please can you confirm if there is a charging circuit on board?

How do I disconnect the charging circuit?

Do you have any with the rechargeable battery fitted?

Thanks in Advance

Simon

[andrew]

I have just received one of these (HCMODU0011), it came with a CR2032 (non-rechargeable battery)

Sorry about this, we believe the manufacture mistakenly shipped a batch of these modules with a CR2032 fitted. As with the DS3231 module these RTC modules are advertised and should be supplied with a rechargeable LIR2032 battery. They have currently been taken off sale whilst the problem is resolved.

board in which case there is a risk of overheating the CR2032 if it's being charged.

The DS1307 uses an identical charging circuit to the DS3231. As the charging circuit only allows a few mW's of power to be driven into the cell heating of the battery is very unlikely. However, I would I still recommend that you do not use the module with a CR2032 battery fitted whilst the charging circuit is enabled.

How do I disconnect the charging circuit?
Do you have any with the rechargeable battery fitted?

In a similar way to the DS3231 you can disconnect the diode D1 located near the SQ pin. However as mentioned above these modules should be supplied with a LIR2032. If you purchased it from us just send an email to sales [at] hobbycomponents.com with your order number and will attempt to resolve the problem. My apologies again for this issue.