Suz wrote:Yeah I was logging a track but just in the office at work - so it probably wasn't making many way points. I'll try again today.
Changing batteries on the gps every 2 days doesn't sound like it'd save me that much weight. If Keithy is right and its 60gm for 2 AAs. And then the xiaomi 16000 - which weighs 350gm should charge my iPhone 5 times (assuming the 6 and 6 plus suck up the same amount of energy which perhaps they don't), then the weight per charge is 70gms. When you say your AAs last 2 days...how many hours of operation are we talking?
As a rough guide I turn it on at around 7:30am and turn it off at around 5pm. It will actually last 3 days if I am only logging my walk, but if I am constantly looking at contours and flicking around different screens then 2 solid days is a better estimate but I guess I don't change them until well into the third day as rule.
The best way to find out is to actually do it. You will need a power bank regardless and those xiaomi 1600's at $30-40 are incredible value given their quality and storage, so use your iPhone for a few days as a gps and camera etc and use the power bank to charge it and you will soon see if its able to do what you want.
Personally I think it will. As I have shown in my testing the power bank charges my iPhone, 6 times from fully flat. So as an example if I was using only my iPhone on the OLT and I ran it totally flat every day, which I would have if I was using it for a gps, then I would have been able to do the full 6 days no problems.
The only question mark would be if I needed to charge it during the day because my gps app used the battery up faster than a day.
I chose not to risk it and I took my garmin to log my walk. Not that there was any risk involved but I had no other camera besides my phone so I didn't want to 'risk' not being able to take photos