[Leica] Portable Power Supply

[Tina Manley]

The LifePower unit I got is not cheap or light but it will charge my SL batteries on 3 hours of solar charging.  This trip will be a trial. If it doesn't work or the airline takes it away from me, I will be using my cell phone which I can charge with a solar battery.

Tina 

Sent from my iPhone

> On May 19, 2017, at 8:27 PM, Spencer Cheng <spencer at aotera.org> wrote:
> 
> USB 3.1 power sources can deliver 12V and 20V. Other than plugin power supplies (i.e. the MacBook Pro PSU), I am not aware of portable USB battery banks that can deliver 12V. It would require different electronics (builtin power supply management silicon to do voltage conversion) or some other way of wiring compared to standard USB battery banks.
> 
> In any case, those are not likely to be very portable nor cheap.
> 
> Regards,
> Spencer
> 
>> On May 18, 2017, at 22:11, Jim Nichols <jhnichols at lighttube.net> wrote:
>> 
>> Aram, the problem may be voltage, not size.  I think the SL battery is 8.4 volts, so the supply voltage source would have to be higher, if my old EE recollections are correct.  The iPhone batteries are only 3.8 volts.  USB charging voltage is 5.0 volts, hence the SL can't charge from those, but many smaller devices can.
>> 
>> Jim Nichols
>> Tullahoma, TN USA
>> 
> 
> 
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information