Review: USB battery box 4x18650 Coolook PB-2000

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!

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).

Alright, purchased. Thanks for the help :slight_smile:

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

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Check that plug charger is dangerous.

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

Check that plug charger is dangerous.

http://www.lygte-info.dk/info/usbPowerSupplyTest%20UK.html
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Which one do you refer to in HKJ site?

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.

Check that plug charger is dangerous.

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

So the specifications saying “Charging input: DC 5V, 0.5A~2.5A.” is wrong? And you can’t use a normal USB charger but need a custom DC power supply?

Why? It’s surely fake and not the adapter tested in the charger tests mentioned earlier?

One detail I do not check, is how the charge circuit handles lower input voltage. If it reduces the charge current, it will probably work with most chargers.

You can get USB chargers that are powerful enough to handle this box at full charge current or you can take the batteries out and charge them in a normal LiIon charger.

Can you recommend any 2.5/3A USB chargers that are USB charger coded and not that dodgy?

Probably not.

USB charger is only rated up to about 1.5A. This does not prevent it from delivering more current, but manufacturers may chose to label it as Apple 2A.

USB chargers with multiple outputs are usual the best, they often run all the outputs in parallel, i.e. a charger with 4 0.5A output, will have a total of 2A, that can be drawn from any port, as long as the other ports are unused..

Yes, I ment multi-output chargers. There are some rated for 3A/15W or so but probably of questionable quality (and says for iPad etc)… I know there is a model from Pisen with 2A+1A “for Samsung” but only for Chinese market and I haven’t seen it for sale anywhere.

I could always use one of the 5V 4A power supplies I have, but they are not so small and can’t be used for anything else. If I bring an 18650-box on travels I want to be able to use the same USB chargers as for me and my gf’s phones and tablets (1A-2A, no Apple products).

mfm, was it this Pisen charger, with separate 1A and 2A USB sockets?

Yes. However, I’m only marginally interested and I won’t buy any more Pisen products until they replace my broken power bank.

(Also I imagine it would be a headache to order from tmall.com, even though the Chinese language and delivery to a Chinese address would not be a problem in itself).

My Coolook battery box only gives 1A out of either port. I bought it to charge my ipad, but it’s of no use to me.
It will show charging, but my ipad just holds its own and after a while shows not charging.
I tested both ports with a charge doctor, and they read 1A. I also tested my ipad charger with the same charge doctor and it reads 2.1A

I’m still looking for a good battery box that will give me 2A for my ipad.

This 2 x 18650 box can do 2 amps. Ebay $8.29. Also the 4x18650 Huamen/Evertones ET-406. Neither are ideal for charging the 18650s. With luck there might be room to cram a tp4065 charger board in the 2 x 18650 box under its pcb.

it’s not that your Coollook can’t put out 2.1A on one of the ports…its the device charging needs to see the apple charge signature from the charging device…if it doesn’t see it, it will automatically restrict it’s maximum charging capability…

You need to setup a charge controller or build a dedicated charging port for your device

http://oshpark.com/shared_projects/NIDe7kjj

The chip mounted on this lets the device plugged into it know it can deliver the proper current

Actually to fix your problem…you need a USB wrapper…a device to get between your charging device and charger and then tell it thru resistor bridges and whatnot what juice to pull

hmmm…wonder how accurate that is

Alot of times I see these chargers say they have that coding but looking thru a charge doctor it just won’t pull more than 1A, then opening it up see the pads for the resistors connected to the center data pins and nothing being there…save that .0001 cents by not putting those resistors in