The only thing I can suggest is run the phone from its battery.  If you
need to charge up a power pack or battery from the dynamo then recharge the
phone from that.  For a lithium battery try to keep it charged more than
70%.  Running it until its is fully discharged reduces the number of times
you can charge and discharge your phone.

Floating around on the shelf I have a USB device that takes two AA
batteries, they can be rechargeable ones, and it will recharge a phone or
tablet.  I one I have is by Everready but I'm not sure if they still make
them.

Why are you using a dynamo to run the phone by the way?

Thanks John

On 14 August 2017 at 17:57, Tom <[email protected]> wrote:

> Hi John,
>
> I suspected that might be the case. Osmand seems fairly sluggish when it
> starts to load the map data. I do have a lot of maps installed of various
> regions. I never use the data maps only offline maps. Is there anything you
> can suggest that I disable that would make Osmand run quicker? It's
> probably a feature that I've become addicted to using like shading or
> something like that. I'm pretty sure having POIs enabled uses more
> processing power so only have that on when needed.
>
> What if I deleted most of my maps? Is Osmand searching through all of my
> maps when it starts up? If I only have one country installed then maybe
> that would help? I have all of Europe on my memory card at the moment.
>
> Thanks
>
> Tom
>
> On Monday, 14 August 2017 22:41:18 UTC+1, john whelan wrote:
>>
>> On a conventional PC that has an under sized power supply it will run
>> quite happily until the power required is greater than can be powered by
>> the power supply.
>>
>> On a PC you can put a meter on the cord going to the wall then run
>> different software on the PC.  Some will use noticably more power than
>> others.
>>
>> OSMand happens to be one that does more computing hence draws more power
>> which means it is more sensitive to power problems.
>>
>> When the operating system only is running the current demand is low.
>>
>> Cheerio John
>>
>>
>>
>> On 14 Aug 2017 5:16 pm, "Tom" <[email protected]> wrote:
>>
>>> Using a power pack is one solution yes. I have a three way switch which
>>> switches between dyno lights only, both dyno lights and regulated power
>>> output or just regulated power output only. The regulated output could go
>>> into a pass through battery which would in effect act as a UPS. However the
>>> reason that I am posting this issue on the Osmand forum is that Osmand
>>> crashes when other applications such as Locus or Strava remain stable under
>>> the similar circumstances. So why would only Osmand seem to be affected by
>>> this issue? The operating system seems unaffected.
>>>
>>> I like to run Osmand so that the screen comes on only when an
>>> announcement is made which is a fantastic feature for saving battery power.
>>> It's this that has been saving my skin recently as I have been doing a lot
>>> of very hilly rides where there isn't enough power to feed into the phone.
>>> So of course whenever I get to an uphill I switch off the power to the
>>> phone and Osmand crashes, sometimes it doesn't. This is really frustrating
>>> as I then have to wait for Osmand to restart from where it left off. At
>>> which point it then begins to start saving a new track log.
>>>
>>> I've managed to send one Osmand crashlog so far. Not sure where Osmand
>>> saves it's crash logs. Would there be any way of retrieving these easily?
>>>
>>> Andy's suggestion on getting Android crash logs looks too complicated as
>>> it seems I need to install another app on my laptop and the logs are
>>> indecipherable without this app if I've read that correctly? Besides, it's
>>> not Android that's crashing.
>>>
>>> However, in answer to Andy's question. No it doesn't crash when I plug
>>> or unplug a regular charger which would suggest that it's the manner in
>>> which it's being charged. Why then aren't the other two aforementioned
>>> applications affected? What is making Osmand so sensitive to the power
>>> connections?
>>>
>>> Thanks for all your suggestions so far.
>>>
>>>
>>> On Monday, 14 August 2017 17:52:03 UTC+1, Peter B wrote:
>>>>
>>>> Idea for a workaround:
>>>> Could it help, using a power pack between bike dynamo and phone ?
>>>> It should offer input and output at the same time.
>>>> This should buffer any peaks which could come from dynamo.
>>>> It is not expensive and if would help...
>>>> Regards Peter
>>>
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