[classicalguy]

I have a 6800 mah 12 volt external battery, and a connector to fit the Eken. The battery seems to work fine with the Eken, but I'm worried about doing long term damage with 12 volts rather than 9 volts. I remember some early posts where people were using 12 volt chargers without any trouble. Any long term usage reports? Thanks.

 

[exilaus]

anybody connect direcly 12v on eken........ you need voltage regulator or step down circuit(complex but much efficent)... search...

 

[classicalguy]

Unfortunately, I don't know soldering or circuit design. 12v does work without dropping the voltage, but I don't know about long term. It is hard to find things on this forum because of all the broken linksSent from my Eken M001 using Tapatalk

 

[exilaus]

Each circuit has an operating range of the voltage. I think 12v is exaggerated,i think you have a high risk to broke battery or power circuit of your Eken.

 

[exilaus]

for not risk this is fast solution for you :http://www.dealextreme.com/details.dx/sku.26588with this you don't problem to use in car or with 12v battery

 

[classicalguy]

Exilaus: I actually have one of those car adapters. It did not work in the car - it lights up, but I don't get charging on my EKEN. Maybe a bad cable - it's very thin and cheap. Even if it worked, there is no way to plug it into my LIPO battery. My battery takes a standard 5.5x2.5" round plug, not a car cigarette lighter jack. It might be possible to take the thing apart and solder a wire in place of the cigarette lighter adapter, but I don't know how to solder and I would be concerned about getting the polarity wrong.The issue I'm raising is whether 12v is within spec for the Eken external power jack. Some time ago, someone posted (maybe on the earlier email forum) that they were using a 12v ac adapter without any problem - I was wondering if anyone had done that for any length of time without problems?Probably risky to try it. Maybe I'll get some courage and take that cheap car adapter apart and see if I can make a voltage adjustment device. I'm sure it won't be very efficient, as the car adapter is very cheap.

 

[yojason]

I bought that charger. Seems to charge the unit but not at 9v but when Iswitch it to 12v it charges the unit. Havent used it long term though.

 

[exilaus]

2 day past arrive me this tape of 12v battery 4800mha

Charge it for 24h take a multimeter and check output of battery 9.6V .....for stay safe for long term need only little resitor.if you have same battery and if have minimal pratice with iron solder i suggest you buy a resistor and put it only for security.for ohm's law the need resistor of 0.6 ohm 1wthis is my opinion....i don't test never because my unit is in customs stops...:mad:

 

[exilaus]

mmm i retest this battery with multimeter start to 8.9 and slowly voltage groove mmm think better use lm7809....

 

[classicalguy]

I have a different battery, but the same idea. How do you test the voltage output? I have NO experience with soldering iron, unfortunately. It would be nice if I could buy a cable that had a resister already in it to drop the voltage.

 

[Pipa]

I have this battery Power Bank 501 Power batteries Prestigioand I am content