Review: USB battery box 4x18650 Coolook PB-2000

EDC Gear for Flashlight Carriers USB Power Devices
38

Thank you for the excellent review!

Maybe you can answer a general charger/power pack question I have: My ZTE Engage smartphone is very picky about what will charge it. The two battery packs I have built already will charge the wife’s HTC One but not mine, my guess is because of something to do with the data pins. My power packs only use the + and - wires. So my question is about what certain chargers do to make the device it’s connected to think it’s connected to a computer, and how to know which chargers do that. Thanks!

39

Try checking the link in the "Notes" section of the review, at the bottom of that page is a table that might be useful.

40

This looks like a nice box, with different voltage outputs and display.

41

Hi HKJ, got some question about the USB power adapter that come with this box(purchased from fasttech)

What kind of coding does this one use?

I figured that they are 6.2 kΩ on both D+ and D- pulldown, 5.6 kΩ on D+ pullup and 10 kΩ on D- pullup.

Edit : Just cut some crappy USB cable and check it with DMM and yes, it’s Apple 2.1A coding. :slight_smile:

42

The best match is Apple 1A, but the voltages are slightly high for that. I do not know if a Apple product will accept it.

43

Sorry for late update, just cut some cable and check with DMM and the voltage match the Apple 1A coding (got 2.001V on D+ and 2.702 on D-)

Edit : I was wrong, it’s 1A as HKJ said

44

Thank you for these great reviews HKJ. It really helps to get an idea of what these products are so we don’t have to order blindly.

I have a question about using cells of different voltages in this or other boxes. Why is this not a good idea? Shouldn’t they balance each other out since they are in parallel?

Also, would using different types/rands of batteries within the same box be OK? (eg Sanyo UR18650FM and Panasonic NCR18650B)

And lastly, Any chance that you could review this USB battery box?
QIDIAN 3-Piece 3A 1-4*18650 Dual USB Output Mobile Power Pack Battery Charger Kit

https://www.fasttech.com/products/1420/10004461/1341401

Thanks a lot.

45

They will balance each other out, usual in a couple of minutes. To avoid this high cross current, it is better to start with about the same voltage on the batteries.

It is the same when charging in parallel, it is recommended that the batteries are close in voltage, before you start.

It will work, but you might not get the full advantage more batteries. With four of the same, they will always share the load. If you mix UR18650FM and NCR18650B, the UR18650FM will have the main load at the start and the NCR18650B will have the high load at the end.

Yes, there is a very good possibility. I have it in queue (That means that I have), but that queue is rather long at the moment, i.e. it will probably be more than a month, before I post a review.

46

I bought just bought this one myself JIB LB20000

47

Just to let everyone know , mine came from fasttech and it happily charges my iPad and iPhone -:slight_smile:
I’ve actually ordered another for our camping trips.

48

Thanks for the great review!

Going to buy this from fasttech as they’re providing a suitable ac adaptor… Problem is that I’m in Australia so I need a converter from here: http://www.fasttech.com/products/1183109

Should I get the 6A or the 10A one?

49

6A is more than enough, but you might want the 10A to get a more solid adapter.

50

Sorry, what do you mean by more solid adapter? Is there a better one available somewhere I should be buying instead? Or did you mean that with the 10A it will work better?

Also, will panasonic 18650 protected batteries fit? The length is 69.4. I know you said 70 is the maximum length, just double checking :stuck_out_tongue:

Thanks alot!

51

I would expect the 10A adapter to have a slightly better construction, because it must be able to sustain higher current.

I do not know of better adapters, but there probably is.

Yes it will, but probably a tight fit (Sorry, I am not near the box at the moment).

52

Alright, purchased. Thanks for the help :slight_smile:

53

A shame it doesn’t have digital readout, like some of the boxes out there.

54

[/quote]

Check that plug charger is dangerous.

http://www.lygte-info.dk/info/usbPowerSupplyTest%20UK.html

55

Check that plug charger is dangerous.

http://www.lygte-info.dk/info/usbPowerSupplyTest%20UK.html
[/quote]

Which one do you refer to in HKJ site?

56

I strongly recommend to get this USB power adpater

My niece bought one lookalike as JIB LB20000, she told me she just able to fully charge her iPhone 4 about 3-4times.

I pry open which also in turn, broken all the plastic hinges, the PCB charging current is +–800mA measured.

Inside consists of eight 1100mA noname blue wrapper 18650 batteries, which takes 11 hrs to fully charge the unit.

While I do not own the JIB version, maybe it uses different battery.

She’s very happy that I gave her one of my portable power supply, consists of two Sanyo Red 2600mA and a 4 ports USB wall adapter, in terms of compactness, hours to charge the portable power supply & able to charge her iPhone 4 about 2.3times.

57

Check that plug charger is dangerous.

http://www.lygte-info.dk/info/usbPowerSupplyTest%20UK.html
[/quote]

Thanks for pointing that out to me, but it looks like it is the 240 volt version, whereas I got the USA version with the 2 flat blades and I don’t see that model in the review, with that said though I haven’t even used the usb plug-in charger it came with, rather I used the Samsung charger that came with my phone. The battery power box itself seems very well built and arrived 3/4 charged already, took no time with the Samsung usb charger to top it off.

Again thanks for the heads up, to be safe I’ll probably not use the included usb charger even though it’s a different model than reviewed.