I have another Samsung pack in the mail so test each and every one through several cycles over time. No leaks, failures and maintains voltage. What I don’t have are any fresh new cells to test against but plan on investing in high current Sony cells down the road.
My very fist pack from last year: Pack 1, Sony 2150mAh, May 25, 2004 date code. Every cell holds 4.2- 4.1 after days rest and capacity fine through hobby charger. I won’t toss these!
Cheers
Edit:
Sony date codes from around the forum:
on Sony lithium ion cells look at the first two digits in the second row.
8A = 2600mAh
G7= 2400mAh
G6, 6A, 6B= 2200mAh
G5= 2150mAh
G4= 1950mAh
The last 5 digits of that row tell the manufacturing date.
digit 1: year. Q=2008, R=2009, S=2010 and so on
digit 2: month. A=Jan, B=Feb, …J= Oct
digit 3+4: day
digit 5: electrode history
so the cell on the photo was produced on Oct 29, 2008 (QJ29)
These are the first set of batteries I got from 18sixfifty…they work GREAT and every light I put them in run like a champ…of course I only run them in my “daily driver” lights at around 3~ max
Sure would extra mAh be nice…but if you can get em dirt cheap go for it!
The ones with the blue ring around the + connector are 2600mAh and work just as well
The price for these are good and they’re listed as genuine and new. Only thing that concerns me is they’re for a model which is very dated now. It’s for an Acer TravelMate 3200 which is from 2004. So these batteries are at beast from around 2005/6? That would make them pretty old. What do you guys think?
Just pulled appart a Fujitsu Siemens pack BTP-C1K8 , 11.1v 4400 mAh
It came from a defect lapop, probably main board defect. (wouldn’t turn on)
it contains 6 cells, Sanyo UR18650FJ, they are 2200mAh
The sanyo labeling is very difficult to see at first, the clearly printed info on the cells lead to nothing
All 6 read 3.8v after separating.
Kept 4 out of 6, 2 of them were dented on the side and bottom.
This was a new, never been used pack that I was able to tear open with my bare hands. Either I’m turning into a monster or this was an exceptionally easy pack to open.
All 6 Samsung 26D cells were sitting at 2.9V and are charging now. I have no reason to think that they won’t charge up to just slightly lower than their rated capacity of 2600 mAh.