I have two spare batteries for my 5800, the 2nd one bought through Amazon from Online, as below. It was the cheapest to have a capacity stated, the same as the original:
B10077#1 - Original Nokia BL-5J 1320 mAh Battery for 5800 XpressMusic - From Online - £7.67 delivered.
I have used it quite a bit now and it seems to be as good as the original, which the 2nd was not - not quite, at least. I would think that I'd get 10 - 12 hours solid use on Viewranger. Just back from 5 hours walk, with GPS running. Phone came off charge yesterday morning, used a bit since then as phone, had 6/7 bars battery at start of walk, came back with 2/7 left. Hope this helps. But it seems that batteries generally run down faster once the first bar has gone. I'm quite happy with the battery life of this combination.
Kate - I know your 2nd battery was poor - try one of these?
Re Viewranger, I am in awe of its abilities. It is hard to see how it could be better, and if anyone is pondering its purchase, get on with it! Very easy to use, and being able to see your route on the map is enormously useful. It really shows the inaccuracies of the OS, too - as I have just seen yet again on a well known path on the moor here - it's way out. I teach and assess navigation, too, and the ability to show someone their track on the screen, with any errors in route-following clearly displayed is a brilliant teaching tool.
