Then what it searches a database?
No, it just gives you the text translation which is either a URL (on many products), or a Serial Number (in the case of LiFePO4 cells). Note, that this text serial number is also printed on the same label right next to the QR code itself (on each cell).
Like example (after take picture with iPhone):
----------------------------------------
Text QR Code
Search Web in Safari
Contents:
"02YCB66710000J8A70002112"
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Because that is all a QR code is, is text. So you can go find some decoder (like I just Googled one and clicked the first one I saw)..
GobelPower.com : LiFePO4 Cells QR Codes Decoder - China Lithium Battery Distributor and manufacturer, Offers LiFePO4 Battery, 18650 Battery, 12V/24V/48V/72V Rechargable Lithium Battery for Home Solar Energy Storage, Electric Bikes, Scooters, Forklifts, Sweepers, Mowers and Boats.
www.gobelpower.com
Paste in the serial number.
Example result:
More info:
You may have noticed that almost every LiFePO4 battery cell has a QR code on it. What is the LiFePO4 QR code? The QR code is generated by a combination of characters that represent information about the LFP battery cell. This is shown in the picture below(Notice where it is on the battery). Using QR
energiepanda.com
I guess a handy app could do all that for you, not sure if there is one in Apple Store, but I would think it may be more necessary for a guy dealing in battery cells day in and day out, but for a general home installer who maybe only wants to do occasional lookups, this method is fine (at least for me anyways). I could keep looking for an iPhone app in the Apple store, maybe someone will make one if there isn't one already.
Perhaps someone else will chime in with better methods as time goes on...
EDIT:
Here is another example decoder from Docan Power:
HOW TO USE BATTERY QR DECODER1. Find QR Code: all brand new LiFePO4 cells have metal QR Code (Data Matrix) on the cell body somewhere around poles. For example(EVE 304Ah battery): 2. Type QR Code:there are code on the metal QR plate. Valid code has to be 24 bits (or 19 bits f
www.docanpower.com