GSP logger with ATOMIC GPS Base

[aquarkm]

Hello,

I am considering building a GPS logger with ATOMIC GPS Base. I would run off a battery on the hiking trips for hours. What is the current draw if I let it running without any power saving mode?

The specification also mentions a button battery for GPS to retain a GPS user configaration. But there is no detail in the spec and nothing in the circuit about it. Does anybody know what type of battery is there and if it is replaceable?

Thanks,
Martin