Yoobao is just a brand. It depends on the quality of the internal components.

Where did you buy the 18650? I'm looking for a few to replace my netbook's cells. 2 are dead.

That;s the battery chemistry, which allows for different charging curves. I'm not too familiar either.

x-treme, this is a fantastic thread. Thank you for the testing and information. This internal resistance for parallel connection info is also useful, as I thought you merely replaced the battery of like or greater capacity.

Will pin this to Note 2 thread.

I have 2 Yoobaos. 1 is the 11200 and one is the 13000. I opened up the 13000 model and it looks legit. My friend bought it in China for me at RMB280 at an upmarket shopping center.



I can charge my Note 2 about a little less than 2.5 times.

Looks like it is giving an effective rating of :

(3.7/5) x (13000) x (75%) = 7215mAh

Would this calculation be a good indication of real mAh rating?

This post has been edited by joytest: Jun 17 2013, 12:20 AM

Same CMICR F8 cells .... wonder if I can swap out my faulty notebook cells for these.

Where or how are you getting the 4.2V charger? Do you mean you will separately charge the 2600/2800 cells with the 4.2V charger before swapping out the notebook cells?

Very skinny LiPo

I can't help but provide a little education:

ERROR:
If you find any racist of trolls,


CORRECTION:
If you find any racist trolls,

Then your plurals should match... racists or trolls...

Of course.

So how much did you get it for? And where?

Good looking =/= Functional

x-treme you are probably an EE guy.

Want to ask, what's a good digital multimeter that I can get? I have been using a cheapo China one for my occasional hacking but would like to get something better.

I see you are using 2 Victor meters. What are the differences between the 2?

Also, do you have experience with those cheap oscilloscopes that are a sort of modded Android tablet?

Maybe coz Malaysians do not have a habit of opening up stuff to see what's inside, and a general modder curiosity, except maybe for noisy motorbike exhausts.

Would you be able to assess the charging board? What kind of regulator are they using?

What kind of repair is performed on a returned powerbank?

Bro wad is the digital multi meter u are using? Do u also recommend the butane based soldering irons?

Item link?

The image looks like micro usb. But I'm skeptical of the claimed 30k rating.

RM10 may be the china no-name no protection type.

There are so many brands. Why don't you try and see how many times it can charge your phone. You take 8400 and consider 75% as real capacity. If it charges your phone sufficiently up to this rating you should be fine.

Heat is bad for batteries. Keeping it in the glove compartment will be a little better but how do you charge it?

Lithium batteries should be recharged from about 10% from what I've read all over.