David VanHorn wrote:

> RF digital also does certified modules.

Yes, I've seen them. At 48 mm x 28 mm, they are bigger than I can afford,
and also the 18 mA the transmitter consumes is quite hefty compared to
others -- but it's still lower than the MaxStream module's. These are so
far my only two certified options.


>> - I'm thinking about using Lithium coin batteries (like CR2354 or so,
>> size depending on what I end up needing for the
>> transmitter/transceiver). Is this a good idea? Any better suited
>> alternatives? They should be user-replaceable. I'm not sure how
>> important it is that they are readily available, but it would be a
>> bonus if they didn't have to order the batteries from us.
> 
> They really don't like pulses of current, even at the 20mA level.

Yes, I've seen this part. There are a number of transmitter modules that
probably would allow me to keep this below 10 mA, but even this may be too
high.

What's the usual battery type for this sort of load (10-20 mA for a few ms
at a time)?


> A small track on the PCB gave far better results. 

This is about what I had in mind. 

Thanks,
Gerhard

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