Best 8650 battery for cheap predator light.

Forums Other Parts, Accessories, & Equipment Best 8650 battery for cheap predator light.

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    Raden1942
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    Please dont bump! This is an airgun related topic! Hey guys I use a couple cheapo predator lights I got off ebay for coyote hunting. The problem is that the batteries keep dying after 10mins of use. I feel like the batteries are the problem not the flashlight. I want to get a couple good 18650 batteries but id rather not pay full 20 bucks per battery that nitecore charges. Anyone know of some budget batteries that can hold a decent charge? Im not loiking for cheap Im looking for something as good as top end or close to it but at a better price. Basically Id like to pay under 20 bucks per bat. Ty

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    STO
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    Batteries and flashlights are every bit as complicated as airguns, if you can believe it. Without details, all I can tell you is that roughly 15$ is what a good 18650 w/ protection costs, in some cases a little more, in others a little less. This is because your cells need to be rated for the draw of your light, and higher capacity cells have lower amperage ratings. It seems unlikely you'd have sufficiently high performance lights to create a problem here, but I'm trying to avoid assumptions. Your problem could also just as easily be with your charger as the cells themselves, as cheap chargers love to kill batteries. So does over-discharging perfectly good cells, which crappy lights will happily do to unprotected cells. 

    So yeah, your issue could be any of dozens of things. 

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    JCD
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    I can't help with what STO points out but you can get 2 LI 18650 rechargeable batteries with a charger off amazon for $20ish….

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    Centercut
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    EBL 18650 batteries bought on Amazon work well for me. Here's a set of 4 with charger for $17.99.

    https://www.amazon.com/dp/B079RTBN4D/ref=cm_sw_r_tw_dp_U_x_yChwCb8ZSE7F2

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    acs
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    Many of us in the high power led flashlight hobby recycle Li-ion18650's. We rummage thru the recycle bins at home depot/best buy/Lowes, etc, get the li-ion tool pack or laptop battery packs then carefully take them apart. Some places won't let you rummage thru, some will. Find one with an out of the way/sight recycle bin and go at it. If anyone asks, tell them you are recycling good 18650, thats usually good enough for most store employees to leave you alone to go at. If not, next, plenty of stores with overflowing recycle bins stuffed full of li-on battery packs.

    Many of the tool packs are stuffed full of 8-20+ high quality Samsung/ Panasonic/LG/ etc,18650s. All it takes is for 1 battery to go bad in a pack for it not to charge or work but all the other batteries are usually good. Laptop batpaks are ok also, but best to get the big li-ion tool paks are the best to harvest imo. Test them with a volt meter and if they are over 3v, they're fine to charge up and use, don't use any that are below 2.5v. Get a good charger, I use this 1 that tells you the real capacity in mah..

    Just got a battery pack out of home depots recycle bin that had 8 Samsung 25q high amp draw batteries, all were at 3.2v, the charge circuit of the pack went bad, that was all that was wrong with it, all are now registering 2480-2520mah on my charger.

    Many throw out or recycle a li-ion tool battery pack when it won't work anymore. I've gotten out of recycle bins almost like new ones before. In most, all but 1 of the batteries are perfect, (or its charge circuit goes bad. Perfect for us 18650 recyclers/harvesters…

     

    https://www.aliexpress.com/item/2015-Liitokala-Lii-500-NiMH-Battery-Charger-3-7V-18650-26650-1-2V-AA-AAA-5/32371732440.html

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    Bob_O
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    I have exactly what Cc has…..and they work just fine between three different lights.  One is a low draw IR light, the other is a medium draw green LED flashlight and the last is a high draw Streamlight Railmount HL-X.

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    acs
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    Be very careful about buying unprotected not big brand li-ion batteries from china/ebay/amazon. Most are junk, consider yourself lucky if you got good ones that are up to the specs on their wrapper. IMO, Go with verified guaranteed brand name Samsung/Panasonic/LG/Sony/etc.

    There is a very large clone/recycler market for these that re-wraps bad or very worn out low capacity li-ion's in fancy wrappers with huge unrealistic mah numbers. Ultrafire or any '***FIRE***' brand battery are usually total junk. The biggest capacity 18650 is 3600mah, so those that claim more are bogus for sure. Seen some claim 5000/8000 or more,,, bogus for sure

    If you just want to buy good quality 18650 batteries, Mountain Electronics sells them for a reasonable price, ships very fast, a good honest company imo. And they have quality lights also. If you're in the market for a new quality pocket rocket light, try the Emisar D4 if you want the brightest little hot rod light ever….

    http://www.mtnelectronics.com/index.php?route=product/product&path=80&product_id=855

    jmo

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    heavy-impact
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    LG MJ1 is the top 18650 cell right now with 3500mAh if you see any 18650 advertised above 3500 it's fake. The MJ1 cell can take up to a 10 amp draw but does not have built in protection so as soon as it starts to dim you need to turn off the light and recharge. I have purchased hundreds of them from this guy on ebay https://www.ebay.com/str/vapahnet/18650-MJ1/_i.html?_storecat=14325652012 He only sells genuine cells. Watch out for fakes.

    If you want a super bright green light try this one https://www.amazon.com/gp/product/B07CSQ65FS/ref=ppx_yo_dt_b_asin_title_o04__o00_s00?ie=UTF8&psc=1

    You can see through a regular scope at 100 yards surprisingly well. I put a regular 1 inch scope ring on it and mount it on a picatinny rail.

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    Pelletgage
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    Manufacturer

    I consider the Samsung INR18650-30Q to be best overall 18650 cell you can buy, and not expensive. This is an excellent source:
    https://liionwholesale.com/collections/frontpage/products/samsung-inr18650-30q-battery-15a-3000mah-flat-top-wholesale-discount-genuine-and-tested?variant=2915614724

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    acs
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    Pelletgage

    I consider the Samsung INR18650-30Q to be best overall 18650 cell you can buy

    I have many of those 30q, they can draw 15+ amps in my big lights, very very good battery. Although my favorite is the Sony VTC6a, it can pull 20+amps and is also 3000mah like the big samsung 30q.

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    Gunny994
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    http://www.mtnelectronics.com/index.php?route=product/product&path=59_88&product_id=352  unprotected 

    http://www.mtnelectronics.com/index.php?route=product/product&path=59_88&product_id=289  protected 

    id go with the protected cells if your lights don’t have low voltage protection built in.

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    Pelletgage
    Manufacturer
    Manufacturer

    If you read the Samsung datasheet for the INR18650-30Q they have "protection" inherent in the design of the battery without the active circuit hardware in the typical "protected" 18650. I have seen these 30Q batteries fully discharged by accident without any effect, and still recharged from zero volts. Given the overall safety and performance of the 30Q and the relatively good capacity and supplied peak current, it seems the first choice for me. They have been available for several years (I have been using them more than a year), and are produced in large quantities. The source LIIOON Wholesale has them in stock, in the USA for under $5. I have lots of them, and they are WAY better than the EBL batteries in my usage.

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    acs
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    Pelletgage

    If you read the Samsung datasheet for the INR18650-30Q they have "protection" inherent in the design of the battery without the active circuit hardware in the typical "protected" 18650. I have seen these 30Q batteries fully discharged by accident without any effect, and still recharged from zero volts. Given the overall safety and performance of the 30Q and the relatively good capacity and supplied peak current, it seems the first choice for me. They have been available for several years (I have been using them more than a year), and are produced in large quantities. The source LIIOON Wholesale has them in stock, in the USA for under $5. I have lots of them, and they are WAY better than the EBL batteries in my usage.

    Don't get me wrong, the 30Q is an awesome battery no doubt,I have at least 10 in my normal rotation for 3+ years now. Samsung makes some of the best LI-ION batteries.Comparing them Sony/LG/Panasonic,,, its like comparing an EDgun to a Taipan, go by individual specs. Your talking about chemical differences in batteries. “protection” inherent in the design" nice spin of words by Samsung,lol…   But in reality to call a Samsung INR safer then a similar INR,  a INR-NMC Sony VTC6, is not accurate, or safe to not take the same precaution with all lithium-ion batteries regardless of chemistry imo.

     

    Just some tidbits of info I've learned about these batteries. All LI-ION batteries will go into thermal overload when their limit is met or physical damage happens. Once the membrane separating the chemicals is punctured and they mix, good chance of thermal runaway. If a _LI-ION battery is overcharged excessively or run down excessively to very low or no voltage, dendrites form in the chemicals that are sharp crystals and can eventually puncture the membrane.  "Spiny projections called dendrites begin to grow from the electrode's surface. As these lithium dendrites grow, they can pierce the membrane separator in the middle of the battery, touch the cathode and short circuit the cell".

    So what that means, even if you don't see a measurable decrease in battery performance from a severe discharge cycle, it can have dendrites form that could cause thermal over run once these crystals eventually grow large enough to cause problems.That's where internal resistance(IR) measurements from a advanced charger come in handy. A high IR usually means dendrites have formed and its something to note and keep an eye on for an increase.Its also good to get a base line IR on new batteries.

    So, the key here with any Li-ION battery is to treat it correctly all the time. Don't dent its case, don't puncture its case, don't over charge to over 4.25v, don't over discharge to under 2.5v. Its easy to take care of these batteries so they last for a decade or more and 1000 charge cycles…

    Most quality flashlights/devices have a integrated protection circuit that prevents over discharge and too high temps/amp draw so an additional protection circuit on top of the battery is not needed as it limits the amp draw in high draw applications and makes for a longer battery. The cheap no name fake/clone china flashlights and cheap vape units do not have protection circuits so more user caution must be used for these type devices or a battery with integrated external protection circuit is good if its extra length will fit in the device….

     

    A warning/tip to my first post on this thread about harvesting/recycling battery paks…

    When disassembling a 18650 battery pack for harvest be careful, don't use a hammer&chisel, sawsall, ect. These packs have sophisticated protection circuits that keep the health of these 18650 good. Hence there will be voltage in most of these packs so handle accordingly. There are little thin straps/strips with pinpoint spot welds to connect the batteries.. these straps are easily removed with a needle nose pliers, or other methods. I like to take a pair of dikes and cut each strip as soon as they are accessible to isolate each battery and prevent sparks/shorts when further disassembling the case/pack. Then remove the straps completely when each individual battery is separated from the pack. That way no sparks or shorts when taking apart the pack… So the key here is to not worry about damaging the plastic case, but take precaution to not damage/dent/puncture/short out the actual individual 18650's. Once you do one pack you'll see what I mean and see its easy to harvest good batteries and also help the environment by preventing the waste of perfectly good 18650.

    jmo

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    cj_86
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    +1 for mtnelectronics.com 

    As a flashlight enthusiast, mtnelectronics is my first choice for any lithium cell and especially 18650’s. Richard from mtnelectronics sells only genuine cells and not cheap clones that unfortunately many people sell. 

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    Buckeye
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    Great info guys.

    Really appreciate the education.

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