DIY Detachable Power Bank Shell Charger Box Kit For 21 Slot 18650 Battery Case very interesting

[sam_sam_sam]

I bought one of these and it works perfectly fine for my new iPhone SE version 3 with wireless charging which I was surprised that it works because of Apple's nonsense with non OEM charging devices that they will not work because of their proprietary nonsense

Here is the website link to this device

https://www.ebay.com/itm/155978897046?var=456476123038

[sam_sam_sam]

I bought one of these and it works perfectly fine for my new iPhone SE version 3 with wireless charging which I was surprised that it works because of Apple's nonsense with non OEM charging devices that they will not work because of their proprietary nonsense

Here is the website link to this device

https://www.ebay.com/itm/155978897046?var=456476123038

One note I brought two more from this seller because the first one that I bought was from a seller that is out of stock at the moment

I tested it with only one 18650 battery cell and it was charged up to 3.45 volts and it was 26% charged state and tested the wireless charger on the iPhone that was at 100%

I will test it more thoroughly probably over the weekend when I have 21 battery cells tested and matched close enough that it will discharge all battery cells roughly to the same level of discharge

[stj]

i dont like that type of unit, the idea of putting used cells in parallel and hoping they dont go out of balance is a bit risky.
these banks never seen to have individual cell monitoring like power tools do.
maybe i'm wrong and this one does - that would be nice.

[sam_sam_sam]

i dont like that type of unit, the idea of putting used cells in parallel and hoping they dont go out of balance is a bit risky.
these banks never seen to have individual cell monitoring like power tools do.
maybe i'm wrong and this one does - that would be nice.

I would agree with you on using very used battery cells I would not cram that many in one small enclosure second of all I would not use high current capacity battery cells

The plan is to use lightly used battery cells that have been tested on the SkyRc b6 battery testing machines that has a temperature sensor that I control what temperature the charger stops charging the battery cells at around 100*F if should trip it while testing the battery pack I will probably use a different enclosure for these battery cells and for this battery bank ( I might just use a different encore for this device and give the battery some more room to get rid of heat from charging and discharging )

The first thing that I am going to do is remove the charging/wireless controller board and do some testing on my bench power supply to see how much current this device will deliver and then put a high amp hour battery on it and test the charging/discharging cycle and see if follow the normal practices for the battery cells that I am going to use

I have found some of these charging/discharging boost controller boards not quite what they should be either the charging voltage is a little too high or the discharging voltage drops a little bit too low or a combination of both of them

And some do not function properly at all or just plain do not work at all meaning that they do not even turn ON

Of course these are the ones that use Chinese made battery cells that I am not very fond of and usually use Japan made battery cells preferably and next in line is Taiwan made battery cells then Korea made battery cells Canada made battery cells are a hit and miss ordeal your not sure just how long they will last they were used in Milwaukee 12 volt battery the M12 volt series for a while and then they changed to LG or Samsung made battery cell packs

[sam_sam_sam]

Well the other two that I just bought show up so now Iit time to modify one of my battery packs that has a circuit board that holds the battery cells in place in this enclosure it will have more room to dissipate heat better because they are only one room deep and there will be space between each cell

I show some pictures of this project when I am finished with it

[sam_sam_sam]

Well I figured out how I going to install the battery cells that I plan on using and how I going to modify both enclosures so that it will be the most functional device

[sam_sam_sam]

This another project that needs to be completed soon for several reasons