Pocket Juice test on Raspberry Pi 3B

PocketJuice 8000mAh & 12000mAh test with Raspberry Pi 3B

Back in Thu Apr 05, 2018 I was looking around for a power bank that will run my Pi and the 7″ touchscreen without needing to find a random battery, build some power circuit to step up or step down the voltage and so on.   I wanted something that’s compact, nice looking for my Smarti-pi Touch case and can pack the power I need for those times I want to take my pi out and about or something to do when the power goes out.
If it can last 3 hours that’s perfect for me.   At first, I was looking for one I can charge and use at the same time. Unfortunately, I couldn’t find anything like that besides going the other rout and having an ugly setup.

So I reached out to other groups and asked if anyone knew of a battery that can suit my needs.  One fella said PocketJuice.  I looked it up and I saw an image of one plugged into the wall outlet.  At first, I didn’t want that.  I didn’t want to pull the battery off all the time and charge it in the wall.  Did some more digging on the PocketJuice Battery Bank and seen that some have USB Micro-B.  Perfect!

I still had the question, does the PocketJuice 8000mAh work with the screen and the Pi and for how long? I was pretty much stuck with a question that no one can really answer.
If you want to view one of those posts here’s one of them.  USB Power Bank for Raspberry Pi 3B and 7″ touchscreen.

So I needed to find this information out and log everything so if the next person asks there is now an answer.


So here is the plan

Everything I provide will be data you can use for your projects.
So my goal was to get the PocketJuice 8000mAh and a voltage meter and do my own tests.

  • The battery bank has two USB ports.   Now I know I cannot run the screen and the Pi on just one.  You need to separate that load.
  • The 7′ touchscreen needs to be on one USB port of the Power Bank.
  • The Raspberry Pi, with the “Dual Fans” needs to be on the other USB port of the Power Bank.
  • This will separate the load and it won’t be too overwhelming on one USB port.

Quick test without my voltage meter shows it will work without the lightning bolt on the Raspberry Pi.   That tells me the power bank has enough voltage to pull this test off.

I created a data sheet of the things I was going to do.  These things are on the more extreme side by playing games, watching videos, surfing the internet and even streaming from Netflix.
Most people who own a Raspberry Pi won’t do anything extreme like this but these are the things I do.   Now for me, I will only use the Power Bank for times that I really need it.  Most of the time my Raspberry Pi will be plugged into the wall.  Again, for me, if it can last for 3 hours, I’m happy.


 

Raspberry Pi 3B (RetroPie) Powered By – Wall Adapter Power Supply – 5.1V DC 2.5A

This wall adapter is found here: https://www.sparkfun.com/products/13831

  • Input voltage: 100~240VAC
  • Load regulation +/- 3%
  • Output voltage/capacity: 5.1V; 2.5A
  • Output cord length: 4′
  • Output cord connector: Micro-B USB type
  • UL and CSA compliant
  • SearchThat.net: Pocket Juice 8000mah
On Power Individually Voltage Amps Power (W) Impendence
7” Touch Screen With Pi Off 05.127 0.0140 00.071 0368.8
7” Touch Screen With Pi On 04.875 0.4589 02.239 0010.6
Raspberry Pi 3B 05.138 0.4258 02.143 0012.6
 Raspberry Pi 3B + Touch Screen 05.055 0.8964 04.398 0005.8

 


 

Raspberry Pi 3B (RetroPie) Powered By – Pocket Juice 8000mAh

  • UNIT MAX OUTPUT 3.4A
  • 10cm (4 in) MIRCO USB CABLE
  • 8,000 mAh Portable Charger
  • High-Speed Dual USB
  • QuickChip Control and Power Source Chipset
    Regulates and protects from over-discharge, over-charge and fail-safe over-heating.
  • Output 5v Vcc 3.4A

These tests include the 7” Touchscreen + Dual Fans on the same battery pack (Separate USB Ports).
All recordings are on the activities below and Pi voltage recordings only.  Not the screen

Table Position Time Pass Voltage Amps Power (W) Impendence Activity Type
1 0:05:00min Pass 05.200 0.6548 03.556 0007.7 Checking Everything Over
2 0:00:00 min Pass 05.199 0.6694 03.547 0007.5 Sonic 1 Em Genisis
3  0:30:00 min Pass 05.200 0.7143 03.667 0006.4 Zelda Minish Cap Em GBA
4 1:00:00 min Pass 05.202 0.6576 03.486 0006.3 Counting Cars 08e02 Kodi Port
5 1:30:00 min Pass 05.200 0.8015 04.455 0007.7 Facebook Mobile Chromium
6 2:00:00 min Pass 05.196 0.8243 03.510 0007.6 Dragon Riders Of Berk s01e01 Chrom NetFlix
7 2:30:00 min Pass 05.199 0.6578 03.578 0007.5 Solitare Desktop
8 3:00:00 min Pass 05.188 0.8347 04.084 0004.7 Fear Thy Neighbor s05e09 Chromium
9 3:30:00 min Pass 05.196 0.6641 03.545 0007.6 Music Audacious
10 4:00:00 min Pass 05.196 0.7158 03.594 0007.3 Pokémon Emerald Em GBA
11 4:30:00 min Pass 05.200 0.6449 03.344 0008.0 Reboot s01e01 Kodi Port
12 5:00:00 min Pass 05.195 0.7623 04.006 0006.7 Spyro 1 Em PS1
13 5:30:00 min FAIL 05.197 0.7537 03.928 0006.9 Speed Punks (Speed Freaks) Em PS1

Any issues will be labelled below here.

Table Position Time Notes
6 2:06:25.00 Had internet issues due to being far away from my modem.
12 5:43:28.00 Jittered near the end of Spyro 1
13 Time Of Death: 5:33:40.99 Died on Speed Punks (Speed Freaks)

This PocketJuice 8000 mAh battery bank had no problems at all. Not once did I see the voltage icon.   My Raspberry Pi 3B acted like it was plugged into the wall.  Everything I did ran flawlessly except the internet because I was too far away from my modem.   I retested it off camera and no problems what so ever.

I recommend using this battery bank.  I give it a Pass.

 


 

Raspberry Pi 3B (RetroPie) Powered By – Pocket Juice 12000mAh

  • UNIT MAX OUTPUT 4.8A
  • 10cm (4 in) MIRCO USB CABLE
  • 12,000 mAh Portable Charger
  • High-Speed Dual USB
  • QuickChip Control and Power Source Chipset
    Regulates and protects from over-discharge, over-charge and fail-safe over-heating.
  • Output: Not displayed on the package.  My tests show it’s under 5V
  • SearchThat.net: Pocket Juice 12000mah

These tests include the 7” Touchscreen + Dual Fans on the same battery pack (Separate USB Ports).
All recordings are on the activities below and Pi voltage recordings only.  Not the screen

Table Position Time Pass Voltage Amps Power (W) Impendence Activity Type
1 0:05:00min Pass 04.975 0.7553 03.745 0006.6 Checking Everything Over
2 0:00:00 min Pass 04.979 0.7402 03.644 0006.7 Sonic 1 Em Genisis
3 0:30:00 min Pass 04.980 0.7590 03.553 0006.5 Zelda Minish Cap Em GBA
4 1:00:00 min Pass 04.985 0.6923 03.487 0007.1 Counting Cars 08e02 Kodi Port
5 1:30:00 min FAIL 04.981 0.7466 03.595 0006.6 Facebook Mobile Chromium
6 2:00:00 min Pass 04.982 0.8456 04.296 0005.5 Dragon Riders Of Berk s01e01 Chrom NetFlix
7 2:30:00 min Pass 04.988 0.6514 03.244 0007.6 Solitare Desktop
8 3:00:00 min FAIL 04.989 0.6186 03.071 0008.1 Fear Thy Neighbor s05e09 Chromium
9 3:30:00 min Pass 04.987 0.6556 03.215 0007.7 Music Audacious
10 4:00:00 min Pass 04.984 0.6539 03.258 0007.5 Pokémon Emerald Em GBA
11 4:30:00 min Pass 04.985 0.6402 03.197 0007.7 Reboot s01e01 Kodi Port
12 5:00:00 min Ok 04.981 0.7094 03.526 0007.0 Spyro 1  Em PS1
13 5:30:00 min Ok 04.979 0.6951 03.466 0007.1 Speed Punks (Speed Freaks) Em PS1
14 6:00:00 min Pass 04.979 0.7009 03.363 0007.8 DestructiveBurn.com (Editing) Chromium
15 6:30:00 min FAIL 04.976 0.7392 03.439 0007.1 South Park Chromium
16 7:00:00 min Ok 04.984 0.6548 03.268 0007.6 Frogger 2 – Swampy’s Revenge Em PS1
17 7:30:00 min Pass 04.986 0.6041 03.116 0008.1 Youtube  Kodi Port
18 8:00:00 min FAIL 4.985 0.6009 02.991 0008.3 Facebook Mobile Chromium
19 8:30:00 min Ok 04.985 0.6682 03.240 0007.6 Medievil Em PS1
20 9:00:00 min FAIL 04.986 0.6188 03.078 0008.0 Phantasmagoria Em DoS Box

Any issues will be labelled below here.

Table Position Time Notes
1 00:01:38 Lightning Icon pops up on heavy loads
4 1:12:34 min Already 1 light out on the battery bank
5 1:39:00 min Facebook freezes on video load/scrolling only
8 3:30:00 min Froze loading tv show in the browser.   Used Kodi instead – data is on Kodi not chrome
12 5:04:00 min Spryro runs sluggish and the audio cuts in and out.
13 5:33:00 min Just like Spyro sluggish
15 6:38:00 min Froze streaming tv show in the browser.   Used Kodi instead – data is on Kodi not chrome
16 7:03:00 min Just like Spyro sluggish
0-0 8:00:00 min Bolt icon fully displaying on everything now
18 8:03:00 min Facebook freezes on video load/scrolling only
19 8:30:00 min Just like Spyro sluggish
9:00:00 min Started to blink
9:05:00 min Screen Blacked-out.  The Pi is still running. I won’t be able to see it now
Time Of Death: 9:09:16.90 min Officially called it dead.  Started dropping power from the screen.

This battery Bank has been plagued by this icon through the whole test.

These issues are due to the voltage running under 5.0v DC.   If the voltage was at 5.0v+ there would be no problems.  Unfortunately, since the PocketJuice Battery Bank, 12000 mAh has this problem.  I give it a complete FAIL.  I would not recommend using it at all on the Raspberry Pi.  I even tested the Pi by itself on the Battery Bank and the same results of being under 5v.


 

I will be updating this post again in the future when these battery packs wear down to give you a better reading from New to Old.

Now I know these Battery Banks were never designed to be used like this but these tests are experimental.


 

Downloads

Raspberry Pi LCD – 7″ Touchscreen 

 

8,000 mAh Pocket Juice Data

  • Pocket Juice 8000mAh.odt
    This is the same information as I provided above for the Table Position / Time / Pass / Voltage / Amps / Power (W) / Activity and Type
  • 8000mAh.ods
    Spreadsheet Data from UM25C USB LCD VOLTAGE METER
    This data shows from the time I started to when the battery died: Read times – Voltage graph / Voltage(V) – Voltage graph / Read times – Current graph / Current(A) – Current graph
  • 8000mAh.txt
    Same Data as 12000mAh.ods just in a text format.

 

12,000 mAh Pocket Juice Data

  • Pocket Juice 12000mAh.odt
    This is the same information as I provided above for the Table Position / Time / Pass / Voltage / Amps / Power (W) / Activity and Type
  • 12000mAh.ods
    Spreadsheet Data from UM25C USB LCD VOLTAGE METER
    This data shows from the time I started to when the battery died: Read times – Voltage graph / Voltage(V) – Voltage graph / Read times – Current graph / Current(A) – Current graph
  • 12000mAh.txt
    Same Data as 12000mAh.ods just in a text format.

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