18650 giveaway, courtesy of downlinx [current giveaway - July 14-21]

Giveaways and Contests
1

Downlinx sent me a batch of 18650's. I haven't done a giveaway yet, and there are plenty of folks that could use a tested battery, so I'll test these and give them away. I'm not sure how many yet since I have lots of other batteries to test and not nearly enough hobby chargers, and some of these might be bad. Post below to add your name to the list. Only the first post will be counted. Winners will be selected via random.org. Members must have joined before the current giveaway period started, so if you sign up today, you'll be eligible for the next giveaway period...which should be next week. CONUS only unless you're willing to pitch in for shipping.

PLEASE NOTE: I failed to realize some people might have a preference for a 4.2V or 4.35V cell. Please state your preference:

  • 4.2V
  • 4.35V
  • 4.2V or 4.35V

Batteries include:

Sanyo UR18650F, 2300 or 2600 mAh, 4.2V (not entirely sure of the identity of this yet)

LG ICR18650 B1, 2600 mAh, 4.35V (will be delayed until I get another hobby charger that can charge to 4.35V)

Panasonic CGR18650C, 2150 mAh, 4.2V


Cell #1: Here's the discharge graph for the first cell, a Sanyo UR18650F actually this was probably a UR18650A. It arrived with a partial charge, topped off at 0.5A, discharged at 0.5A down to 3.0V. The winner is welcome to the raw data.


Cell #2: Here's the discharge graph for the second cell, a Panasonic CGR18650C. It arrived with a storage level charge, topped off at 1.4A and discharged at 0.4A and discharged to 3.0V, the standard conditions for 100% capacity per the datasheet. I don't like these results though, so I'll replace these with a better cell if I can.


Cell #3: Here are six test graphs for the third cell, a Sanyo UR18650A. It arrived with a partial charge. A charging was done at 0.5A, and discharge tests performed at 0.2A, 0.5A and 1.0A. Unfortunately my Thunder AC680 won't discharge at 2.0A and my other charger is wrapped up testing other batteries right now, so I wasn't able to perform discharge tests at higher currents.

http://imgur.com/a/kgM5A/embed



Here is a photo album of the cells. Forgive the shadows. I forgot that happens when flash is used at close distance. There are "back" and "next" buttons on the sides, and a strip of pictures on the bottom to allow you to browse all the images in the album.

http://imgur.com/a/xpnch/embed

2

I’m definitely in! Batteries are hard to come by these days!

Edit: I’ll take either battery! Doesnt matter to me. A free battery is a free battery!

3

Count me in 4.2V or 4.35V

4

Please count me in for 4.2 volt batteries please. Thanks.

5

Why not me? I’m in for a try at a 4.2 cell. Thanks for the chance.

6

Many please! Prefer 4.2

7

Count me in please. Always need more cells. :slight_smile:

I’m fine with either 4.2 or 4.35. Thanks!

8

Iam in. 4,2V

9

yes please ty 4.2

10

Thanks for the opportunity. 4.2 if I get lucky.

11

I’m in, thanks!
My preference is 4.35v, but 4.2v is just fine as well.

12

Could always use extra batts…thanks for the chance. 4.2V.

13

In for those 4.35 batteries, but a 50 50 split would be just fine.

14

I’m in. Thank you!

15

count ” Dracula ” me in pleases

Any is fine thanks

16

I’m in , thanks for the chance
Edit to add… I’m not knowledgeable enough about how many volts i need, so I’ll just decline my chance .thanks

17

I’m in; thank you

18

In please, I’d like a chance to get a set of those 4.35v LG’s.

19

Count me in, thanks. 4.2V or 4.35V

20

Test results for the first cell added to the top post. Since there's been two requests for the 4.35V cell, I'll test that next.