Hi,
I got the 2 that I ordered in yesterday, and pulled the batteries out of them.
The good news is that the batteries are NCR18650 MH12210,. which from what I can tell are Panasonic 2900 mAh.
The bad news is that, of the 12 pulled, they all showed voltage of ~1.9V :(.
I actually got them yesterday, and I’ve hesitated posting, because of the voltage, and because of the normal advice, which would be to toss all 12 batteries :(…
Let me preface the following with the fact that I know that this is the usual advice.
But, I was (1) ticked that these “new” batteries showed 1.9V, and (2) I really didn’t want to toss them and (3) I still consider myself fairly new to LI batteries, so I was curious…
So, I have an Accucel 6, and I decided to do the following with 2 of the batteries (thus far):
- Charge them up on the Accucel
- Discharge them on the Accucel
- Charge them up again
I will note that I only did one battery at a time, and I was monitoring the charger and the battery, esp. temperature, through the whole process, and was doing this in an area that I considered fairly safe (non-flammable surface, somewhat protected area).
Also, the reason I tried this is that I had found some info/threads on the other forum about re-conditioning very old (time-wise) batteries that had been idled for a long time. Also, those seem to indicate that I should have discharged much deeper than the Accucel would do it, by default, but I didn’t change that, and just let the Accucel do its normal discharge.
This obviously took awhile, especially the 1st charge, about 7 hours total for 2 batteries, but:
- I was able to get both batteries charged to 4.1+ V, open circuit. The 1st charge would bring them to about 3.8+ V. During the 1st charge, on one of the batteries, the charger would stop with “VOL SELECT ERR” occasionally.
- Neither battery temperature rose perceptibly through the charge discharge
At this point, I will probably do the rest the same way over time.
I am NOT recommending this to anyone else, but am just reporting what I did.
Jim