BLF UC4 Charger Protected 21700 compatibility poll

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BlueSwordM
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BLF UC4 Charger Protected 21700 compatibility poll
Having support for very long protected 21700s is a must(76-78mm)
64% (36 votes)
Supporting all unprotected and most protected 21700s, and not super long ones, is fine by me(70-75mm)
36% (20 votes)
Total votes: 56

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Edited by: BlueSwordM on 09/26/2019 - 09:30
Agro
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Why are you asking? Is adding 3 mm to the length of the charger a big deal?
On the first glance it seems well worth the added convenience for those who actually have a little longer protected cells.

tempo
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Supporting all unprotected and most protected 21700s, and not super long ones, is fine by me. Seriously. 

If the super rare 79mm "21800" cells require a re-engineering of the UT4 base model (mold, PCB, etc), then i am all against it because of the raise of cost for the manufacturer who will then pass on the extra costs down to the end consumer which is us.

 

All we need is a super compact BLF charger which fits most of our needs at a nice price. Changing the UT4 base will only add to the manufacturing cost!

 

 

BlueSwordM
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Just proving that there is in fact, a lot of demand for it.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Lux-Perpetua
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I seem to be the first who voted for support of super-long batteries. OTOH, I don't see any reason why this would cause significant extra costs. OTOH, I actually do have batteries that require such a long charging bay (e.g. protected LG M50T from the Rofis MR30 flashlight).

tempo
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Lux-Perpetua wrote:
I don't see any reason why this would cause significant extra costs.

i am confident that in the end the poll result will be that overlong batteries support should be a given.

but it is clear why the manufacturer is asking the question. the UT4 charger is already done, ready for relabeling to "UC4 BLF". it is the charger we always dreamed of.

now you guys want the extralong bays. of course, this goes against the original product release.

Lux-Perpetua
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tempo wrote:

[...] the UT4 charger is already done, ready for relabeling to "UC4 BLF". [...]

Okay, makes sense. But as far as I know the BLF charger was meant to be made of aluminum whereas the UT4 is made of plastic.

http://budgetlightforum.com/comment/1550952#comment-1550952

I'm not sure if DLYFull will be using the same tools again. Will they?

maukka
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Absolutely necessary. 76mm at least, preferably 78mm.

If the bays are under 76mm, then there should at least be banana plug connections for an external cell holder.

Bob_McBob
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Yes, of course it’s necessary.

Ozythemandias
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Is this not the charger that does everything?

 

rost333
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BlueSwordM wrote:
The charger will not be based on the UT4.

The protected 21700s make it impossible to use the IT4 as a base.

amishbill
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How long are the protected Sofirn 21700 batteries?

I know every time I shoehorn them into my Zanflare C4 I’m afraid I’m bending something.

DIY LT1 battery wrap image. "PDF on Google Drive":https://drive.google.com/open?id=1IHIEOi1NXu868IYNCzIM7D2Ulpxchmww

Fresh Sanyo NCR18650GAs already wrapped "for sale HERE":http://budgetlightforum.com/node/69120 if you like.

OLd_gUY
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Not too sure how it happened, but I’m embarrassed to say I voted the wrong way Facepalm
Must be getting older than I realized.
Anyway when the votes are finalized, if it’s possible please add one to supporting the longer option and subtract one away from the other.

lichtpfadfinder
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OLd_gUY wrote:
Not too sure how it happened, but I'm embarrassed to say I voted the wrong way Facepalm Must be getting older than I realized. Anyway when the votes are finalized, if it's possible please add one to supporting the longer option and subtract one away from the other.

You can cancel your vote and yust vote the other way Smile
Couchmaster
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Is this because they have a die already for plastic ? Is this – “we are going with aluminium.” no longer the “case”? It would suck to have a buy another charger for the protected cells.

Phlogiston
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maukka wrote:
Absolutely necessary. 76mm at least, preferably 78mm.

If the bays are under 76mm, then there should at least be banana plug connections for an external cell holder.

I like the idea of banana plug connections whatever the bay size ends up being Smile
BlueSwordM
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I really want an aluminium charger, which is why I’m making this poll.

All of the people I’ve spoken to have said this is a good idea, so I want to make this reality.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

d_t_a
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maukka wrote:
Absolutely necessary. 76mm at least, preferably 78mm.

If the bays are under 76mm, then there should at least be banana plug connections for an external cell holder.

This seems an interesting workaround/solution (for people who want it, can purchase option). How difficult would it be to have such kind of connection (eg. in the future, longer batteries become available, we just need a longer external cell holder)?

slmjim
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I've not been into flashlights long, but it seems like I'm seeing increased interest in lights with larger cells than the old standby 18650.  I haven't invested in any 21xxx lights (yet) but that will likely change no matter how much I resist "cell creep".

I voted for 78mm. compatibility (and/or banana plugs) just for future-proofing.

 

slmjim

Great... Carnac the Magnificent tells me I just signed up for yet another expensive hobby.

Smile! It makes others wonder what you've been up to.

ToyKeeper
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BlueSwordM wrote:
I really want an aluminium charger

Usually, battery-charging devices are designed so that the only electrically-conductive exposed parts are the contact pads for the ends of the batteries. Making the entire thing out of a conductive material adds additional risks. Anodizing the aluminum would probably help a lot, but it’ll still be important to take care about things like scratches in the anodizing or damage to the battery wrappers.

On the plus side, an aluminum charger should handle heat better. On the minus side though, it increases the chance of shorts, so extra care should be taken during use and with the overall design.

JoeRodge
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yeeaah I’m not too sure how I feel about it being alluminum. I would rather it just be larger or have louder fans lol.

I love the additional slot(would be nice if there were enough for all 4 slots, I can drra.) for banana connector.

Geronimo
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I vote for longer

BlueSwordM
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@Toykeeper, you’re right.

Another alternative would be to use small heatsinks inside, but while that would decrease material costs, using injection molding would make the charger that much more expensive.

One alternative that would make this very nice would be a dual finishing process.

We’ve experimented this at my plating job, and it was a thick anodizing coat(30um) along with a powder coating finish for additional durability and electrical insulation.

Perhaps that could be of order.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Caleb
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I’d love a charger that fits everything… including charging 4 × 26650 simultaneously.

Anodizing AND powder coating? PERFECT! Cool

Unheard
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The opportunity to support protected 2×700 cells sould not be missed imo.

Agro
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Could it be made pink? Big Smile