cheapest battery pack for $14.96 + no usb peripherals issues


5 posts
by Fosforo » Sat Jan 26, 2013 8:49 am
i was in the need of a battery pack but with a low budget. this was the cheapest one i had found:

http://produto.mercadolivre.com.br/MLB- ... 000mah-_JM

which i believe is the same as:

http://www.amazon.com/5000mAh-External- ... B004P8E612

unhappily in the first test it wasnt able even to bring the ethernet port up (using 1A output port). so i wired both output ports (1A and 500mA) in parallel into mini-USB jack and all go fine. now i am able to use keyboard + 3g + hdmi + ethernet without reboots or usb devices not being recognized.

the plastic case can even be used as a base for the rpi. still dont know how much time can it handle rpi on.

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rpi2.jpeg
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rpi1.jpeg
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Posts: 5
Joined: Sat Jan 26, 2013 7:41 am
by DigitalGeek » Tue Jan 29, 2013 3:18 pm
Hello Fosforo ,
could you tell us how long the battery still alive with your raspberry please ?

thx you
Posts: 12
Joined: Sun Jan 20, 2013 3:16 pm
by magno23 » Tue Jan 29, 2013 8:50 pm
i have the same battery pack and i can power my rpi+wireless keyboard+wifi dongle+hdmi using only the 1A usb port.
i don´t know how good is the battery life with everything connect because i only used it one time just to see if it would work
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Location: Penafiel, Portugal
by Fosforo » Wed Feb 27, 2013 10:43 am
@DigitalGeek - 7 hours fully connected

@magno23 - was it revision A or B? because ethernet draws too much current
Posts: 5
Joined: Sat Jan 26, 2013 7:41 am
by ski522 » Wed Feb 27, 2013 1:50 pm
DigitalGeek wrote:Hello Fosforo ,
could you tell us how long the battery still alive with your raspberry please ?

Battery is 5000mAH and Pi roughly using 750mA then math is simple 5000/750=6.6 hours. That's an approximation since the Pi's power requirements will vary with usage.

Of course OP already mentioned about 7 hours , so math seems to be on.
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