Jeez, some have the info right, others claim dangerous BS.The "charging circuit" is really evil. The battery is otherwise connected correctly.See the schematics here: Remove the 1N4148 and/or the 200R resistor and everything is fine.I also removed the power LED as I use the RTC for a DIY clock. Works great this way with 3.3V supply. (click for bigger image)
I'm assuming that the LED should be lit when it is powered via the battery, and I probably ended up with a bad batch of batteries...?
EDIT: So I figured out how to remove the LIR2032 and replaced it with a CR2032 I bought on amazon... The LED did not light up. I'm assuming that the LED should be lit when it is powered via the battery, and I probably ended up with a bad batch of batteries...?
Your assumption is incorrect! As mentioned in a previous post the purpose of the battery is to keep the internal timekeeping functions running when the power is removed from the module. Don
Ah, you want the battery to only last 210mAh / (e.g.) 10mA equals 21 hours
My experience:My board came with a LIR2032 rechargeable battery and I've been using it for several months now without any problems. No swelling or such. Also, the battery works great in supporting the DS3231 IC's timekeeping whenever external supply is removed.