Icona w3 usb power?

Bon

posted this in my intro- just bought an Icona W3 and love everything except not being able to charge is via a USB charging system. Hoped to be able to charge off either my charging strip or Solar battery pack for travel to avoid extra cords and adapters.  Any suggestions?

padgett

Little or none. Only have one auto (55A) charger with a 6v setting anymore and unloaded it puts out 8.4vdc. Automobile chargers are often poorly regulated and rely on the battery being charged as a control (I only use "smart" or really small "float" chargers for AGM to limit peak voltage.).

 

Case I mentioned was for an antique radio that used 8 "D" cell batteries or a 12v 50ma wall wart. The warts I found were all larger and poorly controlled so I used a 9v supply that put out 11.4v at 50 ma and worked well for the need (I tend to derate old systems about 10% anyway).

 

This is why I would be concerned about connecting a W3 or W510 directly to an automotive cigarette lighter. Even a good system can go to 15v and some '14 model cars are plauged with much higher surgers frying electronics (suspect a bad ground. Don't know). Do wish Acer would release either a mobile 12v-12v charger or specs for one.

padgett

The issue is that the CT devices (W510, W3) require a 12v supply rather than the 5v available from USB chargers. I suspect that given the size of the batteries, a 5v charge might take days. See Tesla.

 

ps hopefully we will see some moble (cigarette lighter) power supplies in the near future, until then I use a 140W 12vDC>120Vac inverter and the normal power supply.

Leho

Padg

For future reference, a 5 volt charger cannot charge a 12 volt battery, ever.

Leho

billsey

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Leho wrote:

Padg

For future reference, a 5 volt charger cannot charge a 12 volt battery, ever.

Leho

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But a 5V charger can *discharge* a 12V battery slower than a dead short.

 

padgett

Oh I dunno, a 2000 ma uncontrolled 5v charger might provide a few ma at 12v, I commonly use 9v (rated) chargers on 12v radios.

 

Those early wall warts were little more than a transformer and a half wave bridge, not like the multivoltage  switchers we have today.

 

That said what I meant was they couldn't use a 5v USB supply even if they wanted to. Didn't you notice the Tesla note ?

Leho

Padg

A rhetorical question.  I do NOT recommend that anybody actually do this.

What expectation of consequences should one have when connecting a nominal 6 volt charger (without automatic voltage detection) to a nominal 12 volt automobile battery?

Leho

padgett

Little or none. Only have one auto (55A) charger with a 6v setting anymore and unloaded it puts out 8.4vdc. Automobile chargers are often poorly regulated and rely on the battery being charged as a control (I only use "smart" or really small "float" chargers for AGM to limit peak voltage.).

 

Case I mentioned was for an antique radio that used 8 "D" cell batteries or a 12v 50ma wall wart. The warts I found were all larger and poorly controlled so I used a 9v supply that put out 11.4v at 50 ma and worked well for the need (I tend to derate old systems about 10% anyway).

 

This is why I would be concerned about connecting a W3 or W510 directly to an automotive cigarette lighter. Even a good system can go to 15v and some '14 model cars are plauged with much higher surgers frying electronics (suspect a bad ground. Don't know). Do wish Acer would release either a mobile 12v-12v charger or specs for one.