USB OTG battery charging?

[liquidphantom]

Is it possible to charge using a USB charger, like you get with a lot of phones these days or is that not recommended? Would save me having to take more than one charger with me on trips.

 

[John Bedlam]

Is it possible to charge using a USB charger, like you get with a lot of phones these days or is that not recommended? Would save me having to take more than one charger with me on trips.

It is, at the very least, possible.


Don't know if it's safe to use any ole' charger though.

 

[tsh]

http://pandorawiki.org/Power_modes#Charging

If charging from USB, it is possible that the battery will still discharge slowly, since the Pandora takes more current (in normal mode) than the USB can supply. Mains charge is configured to draw 1000mA, USB charge is more like 500mA.

Another possibility is to use your pandora to charge the phone (or other device), if this is just to reduce the number of things plugged in over night. Either way, you won't be likely to achieve a full charge in just 8 hours.

 

[John Bedlam]

Either way, you won't be likely to achieve a full charge in just 8 hours.

Yeah, I was just looking at this page, which estimates 20 hours for a full charge from USB.

 

[liquidphantom]

was my belief that USB OTG charging from the mains was done at 750mA rather than the 500mA supplied by a computers USB port or at least my old Xperia X1 charger did. was just looking at my iPhone charger and that supplies 5v at 1A, guessing that's not safe for the OTG port.

 

[Adraen]

The USB OTG should provide maximum 100mA (I've done quite a lot of circuitry using USB) and here is a reference (http://pandorawiki.org/USB_reference) so you could charge your phone but only it draws 100ma and anyway it will take ages.

 

[liquidphantom]

The USB OTG should provide maximum 100mA (I've done quite a lot of circuitry using USB) and here is a reference (http://pandorawiki.org/USB_reference) so you could charge your phone but only it draws 100ma and anyway it will take ages.

I was thinking of charging the pandora via the OTG not a phone from the OTG, So I need to know what the safe input voltage and amperage would be rather than its output

 

[tsh]

The USB OTG should provide maximum 100mA (I've done quite a lot of circuitry using USB) and here is a reference (http://pandorawiki.org/USB_reference) so you could charge your phone but only it draws 100ma and anyway it will take ages.

I was thinking of charging the pandora via the OTG not a phone from the OTG, So I need to know what the safe input voltage and amperage would be rather than its output

The pandora is configured to take 500ma, as it says on the wiki. Since runtime current varies between 300-600ma, it may or may not charge - but it is safe.