[34S] battery warning indicator / question

[MarkHaysHarris777]

(04-05-2015 05:06 PM)matthiaspaul Wrote:  

(04-04-2015 07:40 AM)Bernd Grubert Wrote:  May be you're right, but I don't want to use AAAA-batteries. Taking apart 9V batteries and soldering them in anytime you have to replace the batteries seems uncomfortable to me.

This is exactly my thinking as well.

So, we've established that its generally a bad idea to power a calculator with coin cells. I'm planning to power my generic with lithium ion batts; have a charge cradle (you need to lay it down sometime when you're not using it) which doubles as a docking station for instrumentation bus and pen plotter (still working on making the pen plotter wifi...

Cheers,
marcus