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Last week I was in a summer cottage without electricity, to prepare the life there I carried on with 2 power banks (one w/ solar panel to get extra 10% per day), and car adapter was 20 minutes away, should I have needed it.

I had my SailfishX (Mouhijoki) device on all the time, on cellular network, android services running (so I could receive those ~5 messages per day), and often I had forgotten an ssh connection open (where remote sshd endpoint had ClientAliveInterval set to 240) for hours (overnight and so on).

In addition to that I did some minor web browsing and map viewings, probably accounting 10-20 % of the battery life.

For days I did not have to charge my device at all. The power banks (and the solar extras) were mostly drained to mobile devices of others.

To my estimate (now that I've written the above) is that 2 full charges was enough to keep my device running for a whole week (and I was left around 20% of battery at the end).

I think that is pretty good. I remember plugging my phone to charger often when outlets are available (just to be sure there is power available for potential heavy usage all the time).

Last week I was in a summer cottage without electricity, to prepare the life there I carried on with 2 power banks (one w/ solar panel to get extra 10% per day), and car adapter was 20 minutes away, should I have needed it.

I had my SailfishX (Mouhijoki) device on all the time, on cellular network, android services running (so I could receive those ~5 messages per day), and often I had forgotten an ssh connection open (where remote sshd endpoint had ClientAliveInterval set to 240) for hours (overnight and so on).

In addition to that I did some minor web browsing and map viewings, probably accounting 10-20 % of the battery life.

For days I did not have to charge my device at all. The power banks (and the solar extras) were mostly drained to mobile devices of others.

To my estimate (now that I've written the above) is that 2 full charges was enough to keep my device running for a whole week (and I was left around 20% of battery at the end).

I think that is pretty good. I remember plugging my phone to charger often when outlets are available (just to be sure there is power available for potential heavy usage all the time).