The parts of the number that are lit up are bleeding into the unlit parts so it looks like all parts of it are lit
99 (i think):
This should be emphasized. It’s not even easy to get flat tops out.
They probably did this to keep it from moving around but when you have two cells in there I basically have to bang the other end and let them come lose. A better solution would have been a bit more flex in the terminal and then maybe some foam on the battery cover side to keep them in place from that angle too.
I got my pb2 today from banggood… took 24 days… not bad…
Lcd is not bad… you need to angle little bit to read out the numbers… i have good eyes… not a problem… numbers are clear if i read it from 3 feets…
It feel good… remind me of motorola pebble cellphone texture…
Simple design… 2 usb ports…
I am using lg mj1 flat top for the extra mah…
Mine arrived in the U.S. from Banggood’s China warehouse in only 7 days. Fastest BG order I’ve ever received!
I should mention I did pay for tracking and insurance. It seems this speeds the order along.
My display is much easier to read than yours. If it’s 99, 88, or any other reading, I can make it out clearly.
Mine pb2 came from thailand. According from the package label… your?
The package label says mine came from China.
Can I use different batteries at the same time without any risks, e.g. one Sony VTC6 and one Samsung 35E or would this have a negative effect on one or both cells.
My package says shipped from China too
@FlashTom, no problem whether the cells are discharged, or charged.
For charging the cells, the PB2 has separate charging channels, meaning it is safe to charge different cells.
For discharging, the cells are in parallel, so it does not matter.
Mine hasn't come yet, but I should have read the specs before ordering it as none of my batteries will fit. I hope it makes a decent paperweight.
Wait, why none?
Unprotected flat tops work fine.
I mean none of the batteries I have personally will fit. The only unprotected batteries I own are 30Q's but they are button tops. Most of my batteries are protected.
Oh ok… flat top are cheaper!!
Thank you! What would happen in following situation in the PB2?
Mode: Discharge (e.g. charging up a phone via USB)
Channel 1: Sony VTC5A, capacity 2.600mAh
Channel 2: Samsung 35E, capacity 3.500mAh
Now, being discharged in parallel those cells would always have the same voltage, right? Sorry for raising a stupid question but how does this work with cells of different capacities and what happens when both cells reach something like 2.8V? I always thought it’s no good idea to combine cells of different brands and different capacities regardless whether they’re being used in parallel or in serial.
Think of it as two water containers in parallel, one with a larger diameter than the other. An imbalance would be created IF they were being drained at the same rate, by a separate tap at the base of each, but that is not equivalent to what is happening here.
In this scenario the containers are joined by a thick pipe at the bottom, and are being drained by a single tap. Their levels will stay exactly the same until they reach the cutoff, no imbalance, no issue.
Alright, I guess I got you. Thank you! So, I have to imagine the battery drain of both cells like this?
That is exactly how I pictured it.
Different scenario for the charging circuit though. Take that same diagram and put one way valves leading from the central pipe to each tank , so they can be at different levels but can only fill, not empty, so they won’t affect each other at all.
Now pump the liquid in slowly, it will go to the point of least resistance, filling the more empty container first, then keeping both at the same level and filling them together when the pressures equalize.
In both scenarios, the level or pressure is equivalent to voltage, and the volume of liquid and container is the charge and capacity respectively.
Im loving my pb2! My previous power bank holds 8x 18650s and is big, bulky, and doesnt charge my phone as well even though it claims 2 amps output.
This pb2 fits in my pocket, my phone charges fast, and its got a slick design. I often fidget with the magnetic door while charging my phone and its very satisfying for some reason.