Looking for an AAA/10440 charger

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pthartung
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Looking for an AAA/10440 charger

Hello,
I am looking for a charger to charge my smaller cells. Usually AAA’s or 10440’s. All of my current chargers will charge them, but there is always some fidgeting to get them to work. (usually a piece of paper under the battery) I’d like something for these cells that is more of a drop and go. Any suggestions would be appreciated. I currently have a MiBoxer 8-Bay, XTAR VC4s, XTAR VC8, and a Zanflare C4.
Thanks

jon_slider
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I use the Olight Universal Charger
works great!

pthartung
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That should work, thanks. From reading HKJ’s comments if I use USB from a computer it looks like the current should be safe for the 10440’s.

jon_slider
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pthartung wrote:
From reading HKJ’s comments if I use USB from a computer it looks like the current should be safe for the 10440’s.

I have been using my Olight UC on my desk, connected to one of the ports on my computer.

Though imo it starts out a bit high, slightly over 1C (charging a 650mAh 16340):

it tapers down below 2C within the first 20 minutes, as the charge level rises.

charge finished:

===

Here is a test I did of the Olight Universal charger

I connected a 700mAh 16340 battery that was at 3.67v

and the charger started at 610mA initially, so I agree it is a bit high.

After 5 minutes it is down to 540mA and there is no noticeable warmth when I touch the battery

After 10 minutes the battery is still not warm and charge rate is now 480mA

15 minutes into the charging cycle, the rate is now 430mA, and the battery is still not warm.

20 minutes into the charge cycle, the rate is 330mA

25 minutes, charge rate 270mA

30 minutes, charge rate 300mA

35 minutes since the charging started the rate is at 290mA

40 minutes the rate is now 260mA

45 minutes, charge rate 210mA

50 minutes, now 190mA

55 minutes, now 140mA

went to lunch with a friend, was not present for the end of the test
when I got home the charge rate was 0mA, and the charged battery reads 4.1v.. all good things
note the green light on the Universal Charger USB plug, confirmed 0mA charge rate

and see the battery voltage at end of charge:

I would say the charger is safe, does not charge too fast, does not heat up the battery, and shuts off completely.
thumbs up!

pthartung
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Wow! Thanks for the detail. Do you know if it’s usually the heat during charging that is bad for the battery, or is it the current? I will have to get one of those USB detectors.

jon_slider
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pthartung wrote:
Do you know if it’s usually the heat during charging that is bad for the battery, or is it the current? I will have to get one of those USB detectors.

the USB Volt meter is very reassuring, recommended
here is a link to one

I think excess current produces excess heat, but Im not very well educated on that subject.. maybe someone else can confirm.

mitsuki08
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jon_slider wrote:
I use the Olight Universal Charger
works great!

Do you force the charger to sit flat on the tip of the positive end or do you just leave it tilted sometimes? It works both ways just wanted other’s opinion since I don’t know if it matters
jon_slider
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I do try to make it sit flat
but the angle does not really matter
as long as the red charge indicator is on