Swiss-light/Free-Light review suggestions

[Wits' End]

I've said I will do some low temp testing of the free-light. This will be low tech testing and I'm looking for suggestions on how to do this evaluation.
I am planning on leaving the light in my van and maybe at some point we'll have a temperature below -10.
How can I determine if the light is charged to it's maximum potential?
I won't be able to do a runtime graph but more look out the window and see if the light is on and how bright

I'll use the binder clip method.
The other real-world problem will be the lack of sun in our winter but that is part of the real world up here

.
Any advice on how to make this helpful would be appreciated. TIA

 

[B@rt]

Hi Wits' End (sp

),

How about fully charging it at room temperature and check the runtime, recharge, leave in the cold for a predetermined period, and do a runtime in the cold, recharge, put it out again and check runtime after the light has regained room temp.
This should give some data...

Also recharging capabilities in both normal and cold environments could be checked.

Hope this helps,