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Are these fellows the same style as the ones that are available at Parallax? — Parallax Forums

Are these fellows the same style as the ones that are available at Parallax?

Buck RogersBuck Rogers Posts: 2,185
in General Discussion
Hello!
A local store in Manhattan sells these fellows:
tinkersphere.com/batteries-holders/1264-3-7v-lipo-battery-4500mah-18650.html

From the photo it seems as if they are part of the same, ah, line, as the batch currently available inside the Parallax site.
----
Strange. No robot.

Comments

  • RDL2004RDL2004 Posts: 2,554
    Probably not. The ones at that tinkersphere place claim to be higher capacity than what Parallax sells.

    I noticed that Parallax has photos of their #28987 cells in two places and it's a different brand in each photo.
  • VonSzarvasVonSzarvas Posts: 3,450
    edited 2015-12-31 14:37
    That item #28987 at the Parallax store was introduced a few months ago to replace the previously supplied blue and green colour cells. It might be the case that some older photos still show the blue cells, but the branded 2600mAh Tenergy cells are the ones supplied and recommended now.

    The change may have been made due to quality issues with the old stock. Some cells did not actually provide the power as stated by the mAh label. The Tenergy brand cells definitely "do what they say" ! (We found similar issue when working on the Badge batteries- 2000mAh cells were actually maximum 800mAh :)

    (I don't speak for Parallax of course, this is all based on my experience. Needless to say, Parallax might change products/parts due to supply issues and in search of customer quality and efficiency improvements)
  • Buck RogersBuck Rogers Posts: 2,185
    That's what I thought folks.
    Interestingly enough VonSzarvas, I actually expected a (witty) remark from Publison, but I'll take yours as good enough.

    Rick,
    Probably not. The ones at that tinkersphere place claim to be higher capacity than what Parallax sells.

    I noticed that Parallax has photos of their #28987 cells in two places and it's a different brand in each photo.
    - Rick

    That's the interesting part.
    And VonSzarvas
    That item #28987 at the Parallax store was introduced a few months ago to replace the previously supplied blue and green colour cells. It might be the case that some older photos still show the blue cells, but the branded 2600mAh Tenergy cells are the ones supplied and recommended now.

    The change may have been made due to quality issues with the old stock. Some cells did not actually provide the power as stated by the mAh label. The Tenergy brand cells definitely "do what they say" ! (We found similar issue when working on the Badge batteries- 2000mAh cells were actually maximum 800mAh

    (I don't speak for Parallax of course, this is all based on my experience. Needless to say, Parallax might change products/parts due to supply issues and in search of customer quality and efficiency improvements)

    Well I'll wait a couple more days. But besides there's a pair with my name on it, standing next to six PAB bots.....
    --
    Hey Erco, your robot took a (very) early place in Time Square to watch the ball drop. He's standing next to a character.
  • koehlerkoehler Posts: 598

    Pretty much any of the *Fire 'branded' ones are as likely as not to be used cells with a new wrapper/sleeve.
    If you want/need the actual mah's, stick with a name branded one. Tenergy has always seemed to deliver the best price/performance IME.
  • ercoerco Posts: 20,256
    Buck, you really want these 6000 mAh "FVANOR" cells which positively reek of quality. And check that "sheef life"!

    http://www.ebay.com/itm/FVANOR-6000mAh-18650-Li-ion-3-7v-Rechargeable-Battery-6pcs-For-LED-Torch-NEW-bt6-/311512884488?hash=item48879d6508:g:MdsAAOSwnH1WbY9J

  • Buck RogersBuck Rogers Posts: 2,185
    erco wrote: »
    Buck, you really want these 6000 mAh "FVANOR" cells which positively reek of quality. And check that "sheef life"!

    http://www.ebay.com/itm/FVANOR-6000mAh-18650-Li-ion-3-7v-Rechargeable-Battery-6pcs-For-LED-Torch-NEW-bt6-/311512884488?hash=item48879d6508:g:MdsAAOSwnH1WbY9J

    Very funny. And here I thought you'd get a kick out of the wandering robot story. Right now he's trying to not be stepped on by working dog.

    Seriously folks, I'm simply wondering why the company chose that capacity battery. I do know why the family member was selected.

  • PublisonPublison Posts: 12,366
    edited 2015-12-31 23:47
    OK, my witty response. :)

    Ternergey has always seemed to be to the batteries to buy . Like the previous post, they deliver what they advertise.

    I have been using their Li-Ion and Ni-MH for many years.

    I also do not work for Parallax.
  • msrobotsmsrobots Posts: 3,709
    erco wrote: »
    Buck, you really want these 6000 mAh "FVANOR" cells which positively reek of quality. And check that "sheef life"!

    http://www.ebay.com/itm/FVANOR-6000mAh-18650-Li-ion-3-7v-Rechargeable-Battery-6pcs-For-LED-Torch-NEW-bt6-/311512884488?hash=item48879d6508:g:MdsAAOSwnH1WbY9J

    @erco I am pretty sure this is a typo. they meant to say "sheep life".

    Enjoy a happy new year.

    Mike

  • ercoerco Posts: 20,256
    msrobots wrote: »
    they meant to say "sheep life".

    Hmmm.I thought it was "FVANOR, where men are men and sheef are nervous."
  • MikeDYurMikeDYur Posts: 2,176
    How do you fellas use these cell's it's easy enough to achieve 12V, compared to NiMH @ 1.2V each, seems the latter would have more capacity?
  • ercoerco Posts: 20,256
    edited 2016-01-03 11:39
    Wow, these 'GTF'-branded cells are rated for a full 10 amp hours! 10000 mAh, Honest Injun! Personally, I'd add an 'O' to their brand name and get it over with. :)

    http://www.ebay.com/itm/321917826758

    Edit: But their 9900 mAh cells cost half as much! http://www.ebay.com/itm/281875332475
  • Buck RogersBuck Rogers Posts: 2,185
    erco wrote: »
    Wow, these 'GTF'-branded cells are rated for a full 10 amp hours! 10000 mAh, Honest Injun! Personally, I'd add an 'O' to their brand name and get it over with. :)

    http://www.ebay.com/itm/321917826758

    Edit: But their 9900 mAh cells cost half as much! http://www.ebay.com/itm/281875332475

    Okay.
    ---
    Strange now your robot has returned, Erco. With luggage bigger then he is.

  • ercoerco Posts: 20,256
    Ha. These GTF "9900 mAH" cells delivered a whopping 513 mAH.

  • Heater.Heater. Posts: 21,230
    edited 2016-11-19 11:16
    Hmm... Just happens that on a whim I picked up a couple of these Tenergy Li-Ion 18650 3.7 volt batteries whilst passing through Fry's.

    I'm a Li-Ion ignoramus and my Google fu is failing me so:

    What can I do with these? What does "protected" mean exactly? Could I just hook them up to a solar panel or such to charge them in place, or do I need a charger? Could I knock up a simple charger circuit? Rumor has it they should not be used in series?
  • Buck RogersBuck Rogers Posts: 2,185
    Well I'm using two of the DE branded ones that those characters at RS (still) sell in series to power my breadboard, and also sometimes by Parallax projects, (not the BS1), and they work.

    As for charging, follow the guidelines from Sparkfun regarding charging and use a dedicated charger. Protected means that under the top cap is a special circuit that limits the output to a preset voltage before you'll need to charge them.
    ----
    Strange that robot of yours erco, just left on a walking tour of Asia.
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