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Message: [QUOTE="DS1321, post: 227169, member: 23843"] I just wanted to chime in and say that replacing the small batteries in my non genuine Brother toner cartridges did work as GOGS instructed. I have a Brother MFC-L3750CDW printer and the non genuine toner cartridges use a Vinnic L521F battery. I will say that finding the exact brand battery was a little challenging. Amazon did have them but it took about two weeks to get them delivered. I replaced all (4) toner cartridge batteries as I didn’t know which one was the bad one. I did notice that the Cayman Blue toner cartridge battery was swollen and leaked out onto the contacts. I had to scrape it down a little to ensure proper +/- connections. After replacing a battery I closed the lid each time and the No Toner error still displayed on the screen, this happened even after replacing all (4) batteries. I open and closed the lid few more times and reset the printer. The No Toner message was finally gone. I did have some non connection issues with my phone/ipad but it now is back to being fully operational. [/QUOTE]