Best single bay charger?

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buck91
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Best single bay charger?

Looking for recommendations for the best, most compact single bay charger out there. Strong preference to USB input for power and must be reasonably durable. I do need it for NIMH as well as li-ion. Is there anything better than the olight magnet charger?

RapidLux
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Klarus K1 is pretty compact. Can charge Ni-Mh, Ni-Cd, LiFeP04 and Li-ion. It has a 73 mm bay that fits 21700 cells. It gets good review by HKJ.

Joshk
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The iMax B6 is worth a look if you want an everything charger. It can charge 1 cell of whatever chemistry, or balance charge a whole pack through it balance ports.

Lightbringer
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LK101?

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

xevious
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Do any of these single cell chargers have data display, possibly testing features?

firedome
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In the long run it might be more practical to use a multi-battery-charger, and the size isn’t much bigger either, because you don’t look at the KLARUS CH4S

We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light --- Plato

m00nshine
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Opus BT-C100. It does everything.

Joshk
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xevious wrote:
Do any of these single cell chargers have data display, possibly testing features?

The iMax always shows mAh transferred, whether charging or discharging. It can discharge at a rate up to 2.0 amp and charge at a rate up to 6.0 amp. In 0.1 amp steps.

EasyB
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The Liitokala 101 works well for me. There are a few others from different brands that look like pretty much the same thing. They don’t have a display or testing features.

This one from Fenix does have a display and measures capacity.
http://budgetlightforum.com/node/70118

Petr J.
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Best single bay charger: Opus BT-C100.

Power supply from 12V or USB.

Charge: 200 to 2000 mA. Li-Ion 4,2V, 4,35V, LiFePO 3,2V, NiMh, NiCd.

Discharge: 100 to 1000 mA.

USB output 2.1A – Power Bank.

Long bay for protected cell 21700 WUBEN!

buck91
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That Fenix and the BT-C100 look real nice for this, but do they support nimh as well? I“ll have to take alook at some of reviews/tests out there and check them out!

Petr J.
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Yes BT-C100 supports NiMh and NiCd charging.

lumenzilla
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I’m using magnet charger from Foursevens which similar to Olight’s.
It supports both Li-Ion and NiMH but no powerbank feature.

hank
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Is there a single-cell charger with a switch or other way to force default to LiFePO4 charging?

I want to give an elderly friend a light with a safe LiFePO4 cell and a single cell charger for that, with no risk of overcharging by accident.

I am just not trusting that the “hold the button down until you see the setting” approach is wise for this person’s use.

Lightbringer
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I’d just get one dedicated to LFP cells only. I was in the same situation, just swapped LFP for Li-ion.

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hank
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Quote:
one dedicated to LFP cells only.

If LFP means lithium iron phosphate LiFePO4, then yes, that’s exactly what I’m looking for, a dedicated charger.
But I have’t found one yet.

Hmmm, this may be one — description but no price: https://www.durnergy.com/lifepo4-li-ion-rechargeable-battery-charger-ifr...

If there’s a way to recalibrate/alter any of the many single cell chargers to change the final voltage, I could do a little soldering or other modding.
I have too many single li-ion chargers accumulated over time.

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Lightbringer wrote:
LK101?

EasyB wrote:
The Liitokala 101 …

Did you mean Lii-100? Best selling li-ion charger in the world…

 

For those of you interested in a dedicated LiFePO4 charger: any charger with termination current can be modified by setting a couple schottky diodes in series at the output, they can be easily set low side at the negative terminal cable which goes soldered to the rail tab. This should result in 2 × ≈0.3V of voltage drop. Should also work well with a single standard rectifier. No problem if the drop ends up being a little bit higher, LiFePO4 doesn't really needs 3.6V just 3.4V is enough. Remember to use diodes with enough current rating. Of course, charging efficiency will drop. 

hank
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For Buck91, who asked the original question —- yes, what Barkuti wrote. The Li-100 (and its 2-cell version) are nice, simple, reliable, excellent.

All you have to do is watch the blinkenlights to set it.

Blggg
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I was thinking of either buying a Klarus K1X or a Fenix Are-D1 and I ended up buying the K1X because it is smaller (slightly) and I don’t have to adjust the current. The charger seems to charge just fine. Ther is nothing obviously wrong about it. However, the USB output mode, which is rated just 1A, has a problem when I use 5A-low resistance cables, like Ugreen’s or Orico’s. The charger’s display will flash a few times before shutting down, although this doesn’t happen when I use normal cables. I suspect that the shut down might be caused by the pin contacts of the USB of the 5A cables as they have 6 pins, whereas other normal cables that I have have 4 pins. Just something for you to consider as I’m also trying to find the best one bay charger.

WalkIntoTheLight
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hank wrote:
Is there a single-cell charger with a switch or other way to force default to LiFePO4 charging?

I want to give an elderly friend a light with a safe LiFePO4 cell and a single cell charger for that, with no risk of overcharging by accident.

I am just not trusting that the “hold the button down until you see the setting” approach is wise for this person’s use.

I’m not sure giving any newbie, elderly or not, a lithium-ion light is a good idea. Especially if that requires external charging. Most people will treat cells like they’re as safe as alkaline batteries. It’s just way too easy to short lithium-ion cells, and way more dangerous than shorting an alkaline.

There are 1xAA lights that will give you 500 lumens from an Eneloop. Most people would probably be amazed by that. Why give them the safety issues with lithium-ion lights, even if those LiFePO4 cells are slightly safer than the regular variant.

Plus, a NiMH light can use alkalines too, if they keep the brightness down to a moderate level.

If the person really wants a lithium-ion light, get one with built-in USB charging and low-voltage protection. Load a cell in it (a regular 4.2v cell is fine), and loctite the head and tail threads so it won’t come out.

hank
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Have I been misinformed? I’d been relying on information — typically like this:

Quote:
How safe are LiFePO4 batteries? The LiFePO4 batteries are the safest type of Lithium batteries as they will not overheat, and even if punctured they will not catch on fire. The cathode material in LiFePO4 batteries is not hazardous, and so poses no negative health hazards or environmental hazards. … LiFePO4 life expectancy is approximately 5-7 years.
WalkIntoTheLight
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hank wrote:
Have I been misinformed? I’d been relying on information — typically like this:
Quote:
How safe are LiFePO4 batteries? The LiFePO4 batteries are the safest type of Lithium batteries as they will not overheat, and even if punctured they will not catch on fire. The cathode material in LiFePO4 batteries is not hazardous, and so poses no negative health hazards or environmental hazards. … LiFePO4 life expectancy is approximately 5-7 years.

Short them and see what happens. Then short an alkaline cell and see what happens. I’m betting the alkaline will at most get a shrug from you. The LiFePO4 will probably get a much better reaction. Maybe not as much as a 4.2v li-ion, but still pretty good. Also, note that it is extremely easy to short a lithium cell with a damaged wrap, compared to a consumer cell.

BTW, don’t do the above.

I’m just saying that if you’re going for safety, don’t let the cell be handled like it’s a regular consumer battery. It isn’t.

I’ve been asked many times by people that want to get a light like one of mine. Unless it’s a AA light, I just tell them it’s a special order and it’s really hard to get them. But I know a lot of idiots, so ymmv.

hank
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Swerving back to the original subject, I’ve got too many single-cell chargers in my Do Not Use bin because if left charging for a while they fail to cut off at 4.2v.
“DeWorld” brand from a Radio Shack sale is one of them. The other is just labeled “Charger” — both made in China of course.

A voltmeter or multimeter is cheap insurance to have when messing with these things.

xevious
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Petr J. wrote:
Best single bay charger: Opus BT-C100.

Power supply from 12V or USB.

Charge: 200 to 2000 mA. Li-Ion 4,2V, 4,35V, LiFePO 3,2V, NiMh, NiCd.

Discharge: 100 to 1000 mA.

USB output 2.1A – Power Bank.

Long bay for protected cell 21700 WUBEN!

!{width:60%}https://p2.uloziste.com/fotky8/w8dbf6587670b919/00c67726913c481f-3.jpg!

Thanks. I like this. While I like having a 4 bank charger, generally I’m running 1 or 2 cells in it. Only once in a while, 4 cells. Having this intelligent 1-bay charger for portability is something I appreciate.
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Petr J. wrote:
Best single bay charger: Opus BT-C100.

Power supply from 12V or USB.

Charge: 200 to 2000 mA. Li-Ion 4,2V, 4,35V, LiFePO 3,2V, NiMh, NiCd.

Discharge: 100 to 1000 mA.

USB output 2.1A – Power Bank.

Long bay for protected cell 21700 WUBEN!

!{width:60%}https://p2.uloziste.com/fotky8/w8dbf6587670b919/00c67726913c481f-3.jpg!

Hi Petr J.

Just curious about your Opus BT-C100 that fits protected 21700 battery.

I got an Opus BT-C100, but while it is long enough to fit unprotected 21700 batteries, it doesn’t fit protected 21700 batteries (I’m using the same Wuben protected 21700 battery as your picture, it’s the battery bundled with Wuben TO50R-HC)

I agree that the Opus BT-C100 is probably the most full-featured single-bay charger/analyzer, although it’s a lot bigger than most single-bay chargers.

hank
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Petr J.
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ChrisGarrett
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I’ve got two each of the Liitokala 100s and 202s and for USB chargers, they’re fine for their price-points. About $22 shipped from GearBest a few years back.

Chris

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What NOT to buy:

 

Charger Yonii Q1 @ lygte-info.dk

 

Worthless piece of trash like there is no tomorrow. On top of that the manufacturer seals the case, so no chance of fiddling inside by standard means. My last photo Flat Stare says it all (the included USB cable seemed better than the one bundled with Lii-100s, so I kept it).

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I was going to get an Opus BT-C100, but decided I’d rather have a 2-bay charger instead. Decided I don’t need cell testing at this point. Went with the Nitecore UM2. Battery Junction had a really good discount on Nitecore products. Shaved nearly $6 off the discounted price. Seems to be a decent one. Didn’t want to go with the UMS2, because I don’t need rapid charging (which also shortens battery lifespan).