Just keep in mind that production year 2008 is Q for Sony and M for Sanyo, then look on your cell and count backwards or forward to your letter while each letter is a year.
mh i dont know what r1122 means. but its not the manufacturing code, because you see r1122 on very much newer batteries from sanyo. and on those newer batteries there isnt any manufacturing code anymore. the only thing i could find, is:
Sorry to bring up this old thread. But are you guys saying that they don't have UR18650FM stamped on them anymore? I ask because I have just received mine from kaidomain and they just say SANYO R1122.
I think it’s hard to find the exact capacity of the battery .And many times even you buy a battery which told you with 3000mAh ,actually it may only have 2500 mAh ,some even may be 1000mAh .You can just compare this battery with a standard battery.For example ,you have one standard 2000mAh battery ,you can try to charge that with the same charger.Just see the time which takes for the two battery to be full .And then you can use them in the same flashlights to see the runtime for each battery. This is just my method,you can have a try
is there a website which can find out what battery it is if u type in some codes off the battery ? i heard google does that but cant find any info on these ones.
I will revive this topic as some very good info about identifying 18650’s was posted for Sanyo and Sony. I just opened 3 HP laptop battery packs and found one with Sony’s (all 6 constant at 3.84V) and two with Samsung ICR 18650 24B (huge difference for all 12, had to scrap 6 of them which were below 2.5V). As I already identified the Sony production date, I was curious if anybody knows about the Samsung codification - on my batteries there is SDI 544.
Any help is highly appreciated.