Johnny_B_Goode It seems to be the yellow/blue versions that are the exception regarding the Vcc and ground pin locations on these 128x64 0,96 inch oled displays. Don\'t assume any of these oleds are direct drop in replacements just because they LOOK LIKE drop in replacements! Take heed and double check the Vcc/Gnd pin locations when switching to a different brand or colour combination!

Johnny_B_Goode Ibought mine (the Longwei 4 digit unit) November 2019

Johnny_B_Goode Zeroing the accumulated mAH and mWH displays is just a matter of applying 5 quick presses on the button. It needs the current indicator recalibrating "Once in a Blue Moon" to zero out the no load reading. That's so rare an event, I can't remember the sequence so I have to fumble around until I hit the right combo to zero out the no load offset error (ypically just a few mA). If anyone has found a user guide for this gadget on the interweb, please be so kind as to provide a link in the comments.JBG

Johnny_B_Goode An interesting use of the phrase, "Works great" ;-) . . . . . . . . I guess you must have been attracted by the "Get double review points if you are one of the first 3 reviews published!" promise and decided to play it 'safe'. , , , , , I'm assuming you're a well seasoned BG products reviewer in making this assumption. ;-) , , , , , , , JBG 2020-07-02