jl303 wrote:I also found a portable battery that delivers 5v/4a through one usb port. It's called Anker 2nd Gen Astro3.
http://www.ianker.com/product/79AN7904S-B2A
I exchanged with Anker support, and they said it can deliver up to 4a through one usb port or combined. They sell many different batteries but they said this is the only battery that can do it so far.
I just received the battery and a usb to 5.5mm cable.
I just plugged it in with no soldering and no modification, and it seems working fine.
Anker 2nd Gen Astro3 12800mAh 3-Port 4A Portable Charger External Battery Power Bank with PowerIQ Technology
http://www.amazon.com/Anker-12800mAh-Po ... B00CEZBKTO
StarTech USB2TYPEM 3 Feet USB to Type M Barrel 5V DC Power Cable
http://www.amazon.com/gp/product/B003MQO96U
jacky wrote:Hey,
Think that by using these cables:
http://www.amazon.com/Power-Enhancer-Fe ... le+femelle
http://www.amazon.com/niceeshop-Barrel- ... +%2F+2.1mm
And connect 2 usb on this battery
http://www.amazon.com/Upgraded-Capacity ... r+16750mAh
on 2.1A and 2.4A.
It should also work?
vanja wrote:jacky wrote:Hey,
Think that by using these cables:
http://www.amazon.com/Power-Enhancer-Fe ... le+femelle
http://www.amazon.com/niceeshop-Barrel- ... +%2F+2.1mm
And connect 2 usb on this battery
http://www.amazon.com/Upgraded-Capacity ... r+16750mAh
on 2.1A and 2.4A.
It should also work?
hi jacky,
is this a solution you are using or just plan to use?
cause it is most simple+cheap ($32, 11.3oz, featuring a 4.5A total output capable of simultaneously charging 2 tablets)
another candidates from amazon
* http://www.amazon.com/Upgraded-Capacity ... B00M3073L4 ($50, 15.8oz, 3 amps per port or 4 amps through three ports)
* http://www.amazon.com/EasyAcc-20000mAh- ... B01422TC14 ($35, 16 oz, up to 2.4A per port, 4.8A Output)
please share any experience with power banks for xu-4
regards,
Vanja
Respectech wrote:... ameriDroid has a DC-DC converter with more than enough capacity at http://ameridroid.com/products/dc-dc-12 ... -converter on sale for $9.22! So you can use any rechargeable battery pack at any voltage between 5VDC and 30VDC to power your XU4. Great for using the XU4 as a car-puter.
jl303 wrote:I also found a portable battery that delivers 5v/4a through one usb port. It's called Anker 2nd Gen Astro3.
http://www.ianker.com/product/79AN7904S-B2A
I exchanged with Anker support, and they said it can deliver up to 4a through one usb port or combined. They sell many different batteries but they said this is the only battery that can do it so far.
I just received the battery and a usb to 5.5mm cable.
I just plugged it in with no soldering and no modification, and it seems working fine.
venkatbo wrote:Nice accessory @Respectech.
Have a question for you. I have 3 XU4's in my lab and I was wondering if it would be safe (over-current usage protection, etc) to use one of these to provide 5V/4A for each of the 3 XU4's. If that is safe to do so, do you have any recommendations for a psu whose output can be used for the input side of this accessory ?
thanks.
info->boot_cpu_min_qos = exynos5422_freq_table_CA15[L9].frequency;
info->boot_cpu_max_qos = exynos5422_freq_table_CA15[L9].frequency;
info->boot_cpu_min_qos = exynos5422_freq_table_CA15[L15].frequency;
info->boot_cpu_max_qos = exynos5422_freq_table_CA15[L15].frequency;
mad_ady wrote:This information needs to make its way on a wiki page
cat /sys/devices/system/cpu/cpu0/online
cat /sys/devices/system/cpu/cpu1/online
cat /sys/devices/system/cpu/cpu2/online
cat /sys/devices/system/cpu/cpu3/online
cat /sys/devices/system/cpu/cpu4/online
cat /sys/devices/system/cpu/cpu5/online
cat /sys/devices/system/cpu/cpu6/online
cat /sys/devices/system/cpu/cpu7/online
Respectech wrote:I was hoping to find a good solution from the suggestions above, but most of the links above are either 404 or not in stock. There are a couple that seem to be promising, but kind of expensive.
ameriDroid has a DC-DC converter with more than enough capacity at http://ameridroid.com/products/dc-dc-12 ... -converter on sale for $9.22! So you can use any rechargeable battery pack at any voltage between 5VDC and 30VDC to power your XU4. Great for using the XU4 as a car-puter.
Respectech wrote: ...ameriDroid has a DC-DC converter with more than enough capacity at http://ameridroid.com/products/dc-dc-12 ... -converter on sale for $9.22! So you can use any rechargeable battery pack at any voltage between 5VDC and 30VDC to power your XU4. Great for using the XU4 as a car-puter.
Zeroth wrote:Hi everyone,
Is the conclusion to this thread that there is no easy way to power the XU4 by battery? By "easy" I guess I mean... No way without soldering stuff together? (I'm not very good at that and tend to break things when I try). I was hoping for a set-up with some kind of battery pack / power bank and some adapter cables but it looks like that may not be possible?
Cheers,
Jonty
rooted wrote:A power bank would be okay if it has 4A USB output.
Zeroth wrote:rooted wrote:A power bank would be okay if it has 4A USB output.
Hi, thanks for the help. I read that each USB port only goes up to around 2A? So do I have to combine the output from multiple USB ports somehow?
mad_ady wrote:To reduce startup current demands you can boot with only the little cores and manually switch on the big cores as needed. Add numcpus=2 (or 4) to bootargs in boot.ini
mad_ady wrote:To reduce startup current demands you can boot with only the little cores and manually switch on the big cores as needed. Add numcpus=2 (or 4) to bootargs in boot.ini
Zeroth wrote:Hi hommsy, did you manage to get that set-up working?
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