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Thread: is this a safe pack to use? and some advice on building my own pack.

  1. #1

    Default is this a safe pack to use? and some advice on building my own pack.

    i rexcently ordered the SolarStorm X2 off DX
    http://www.dx.com/p/solarstorm-x2-2-...1#.WPL9hCHsJB0

    and i have a few question as to weather i should use the battery pack and charger it came with.

    before i get to the questions heres what im asking about
    the battery itself
    heres the pictures of the battery internals.
    they are around 5 mb each so im going to link them instead of embed them.
    https://a.safe.moe/zjQC8.jpg
    https://a.safe.moe/69802.jpg
    https://a.safe.moe/CdwXK.jpg
    https://a.safe.moe/g6U4f.jpg

    the charger looks like a generic power adapter
    i didn't take a photo of it but its sticker says the following (excluding certifications and icons)
    Power Adapter
    MODEL:HND058
    INPUT:100-240V AC 50/60Hz
    OUTPUT:8.4V 1A

    now for my questions
    1) if this battery safe to use? i ask because i see rust and it just looks wrong. the part with 2 positive and 2 negative contacts connected to the same circuit trace (in https://a.safe.moe/CdwXK.jpg) it looks wrong to me.
    2) what's is the battery's output? i'm guessing 7.4 volts.
    3) is the board a protection and charging circuit? if its a protection circuit, how can i find out what protections it has (if i need to provide pics of the other side i will need instructions to safely re-solder it to the battery leads)
    4) is the charger safe to use? from a safety perspective would it be in by best interest to get a better charger for this. if yes, what charger would be good?

    now i would like to make a 8 cell battery to replace the one that came with it.
    i have most of the the necessary skills to do this but i dont have the following
    • schematics. a thread to show me how is good enough.
    • protection circuit. what one should i get?
    • is it safe to use a iron on the battery (i have an elenco SL5K40, i use unleaded solder so i use it on near max) or should i get tabbed cells.

  2. #2

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    My advice: Get this (http://www.gearbest.com/diy-parts-an...94.html?wid=21) and fill it with quality batteries like NCR18650GA. Add a 12x2mm magnetic disc on the negative terminal of each battery to get a tighter fit.
    Jetbeam Jet-IIIM | Jetbeam Jet-Ti M R2 | Solarforce L2M/L2P/L2T/T1 | Quark 123 | Quark Mini CR2 Ti | Solarstorm X2 | Fenix P2D Q5 (Lost in North Korea) | Acebeam K60 | Convoy S2+ | Manker E14 | Jetbeam Mini-1

  3. #3

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    That's a good find. I was planning on using a storage bin and get contacts off digi-key of similar sites.
    Do you know of any 2s3p or 2s4p rain proof battery cases/boxes like that one (with power lead and protection circuit)

  4. #4
    Flashaholic*
    Join Date
    Oct 2013
    Location
    USA
    Posts
    1,097

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    Another possibility that doesn't require welding/soldering are BatteryBlocs. If you go that route please post a review, since none exist here.

  5. #5

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    Quote Originally Posted by Gauss163 View Post
    Another possibility that doesn't require welding/soldering are BatteryBlocs. If you go that route please post a review, since none exist here.
    I just looked at the battery blocks and the plastic parts all look like they came off a standard consumer 3d printer.
    Now I love 3d printers now I do have 3 printed parts on my bicycle (all parts were made in tinkercad, and are not public)
    2 downtube mud flap spacers (so I wouldn't need to reroute the cables)
    1 cellphone mount replacement part.

    but the product has all issues that come with 3d printed parts.
    Also its no good for outdoor use with batteries, because it will not be water resistant.
    Not a product I would buy for batteries that will be mounted on my bike.

    They may be good for indoor use. But I will not be buying those for testing because I will be using them outdoors on my bicycle.

  6. #6
    Flashaholic*
    Join Date
    Oct 2013
    Location
    USA
    Posts
    1,097

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    Quote Originally Posted by Laharl_Chan View Post
    Also its no good for outdoor use with batteries, because it will not be water resistant.
    Of course, it's not designed to be water resistant. But it is easy to enhance it for such, e.g. using shrink wrap or other methods.

  7. #7

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    I'm still not trying it because I do ride in the rain.
    (I love riding in a cool rain on a warm day, especially if it's a sun shower)

  8. #8
    Flashaholic*
    Join Date
    Oct 2013
    Location
    USA
    Posts
    1,097

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    You might consider contacting him about your needs, since his primary motivation seems to be building packs for bikes, so he might already have solved that problem. if not, he might have other recommendations.

  9. #9

    Default Re: is this a safe pack to use? and some advice on building my own pack.

    My waterproof pack was solved earlier adept1.
    A 3d printed part will never be water tight without post processing (ie dipping the entire assembly in somthing like plastidip)

    My only remaining questions are
    1) Is the pack in the pictures in my OP safe to use.
    2) what's its voltage
    3) what charger would be better than the one provided (see code in first post for label in verbatim)

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