Now that you say something I think I remember hearing that somewhere.
If I had to guess this is the right thing to connect the LCD shield to the main board.
This is the psu I’m going to use now I just need to find a vendor
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Anyone have a link for a good 6s 25v 4amp charger Eu preferably.
That video is why i bought that charger / converter. Just waiting for your case mod! 
Have you used it yet?
No. Board not built yet. It’s actually still sitting in the mailbox.
Instructions for the drok
Unless someone has a better idea I’m stuck with this guy as a example
Have you figured it out?
I’d also like to build a ‘‘step - up’’ charger… My only concern now is that I need a model which has ‘‘constant current’’… too bad the cheap / weaks ones dont have current regulation… have to search for some more models probably as Im not sure how to add current control diy style…
Just get the drok - seems priced pretty competitively.
Seems quite bulky… And I would probably need 200-300w max for now. (max 8A)
Probably will check the vids, perhaps I get the answer if there is an easy solution for adding contstant current to a power supply / step-up converter.
So far it seems that the current is regulated with micro controller. It has a shunt = current meter somewhere and it just tries to hold the current in the same place by varying the voltage (as there is voltage drop, the current is depending from supplied voltage, too, it seems. Not sure about the internal mechanics but this is the ‘‘basic’’ explanation I got from the net.
Second Option is to get this:
Or
–
These are step down… So I might just get higher voltage and then buck it down to the desired amount.
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120v is quite a lot… Though, I think it is somewhat good alternative to the ‘‘Drok’’ module. (also good feature, that it has fan installed already)
No there is not a easy solution for adding constant current constant voltage to a power supply. But this is the microcontroller http://www.jameco.com/z/LT1339CSW-PBF-Linear-Technology-DC-Controller-Single-Output-Synchronous-Buck-9-Volt-to-60-Volt-20-Pin-SOIC-W_1734436.html
Yeah, it is easier to just buy a module which has it…
Though, I found out the correct term is -
‘‘current limiter’’
Current limiting = allow any current to flow to the load, from 0 up to the set current level limit.
See this:
http://forum.arduino.cc/index.php?topic=70739.0
It seems that constant current might be bad, if it is not limited, as it would ‘‘force’’ the current into the battery even if it is not needed to be so high anymore - like at the end of the charge.
Though, I assume not all people will charge their batteries to the max with such ‘‘bulk’’ power supply option… at least I dont intend to do so… 
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Acronym
Definition
CCCV Constant current, constant voltage (recommended method for charging lithium ion and lithium polymer rechargeable batteries)
http://liionbms.com/php/wp_cccv_charging.php
A side effect of using a BMS is that you no longer have to have a regulated charger: any charger will do, even a “brute force” charger, as long as the BMS can turn it on and off.
Yeah, charging with bms is a lot different story…
I was referring to just bulk charging and then balancing / checking the cells after that…
Though, if something fails in such scenario while charging things probably might go bad, too!.. (bulk charger, no circuits in place to stop the charge if one of the parallel pack’s go bad)
Might just choose a bms for charging only, as the amp rates wont be that high then… Ive heard ppl doing it.