Does USB charge flashlight is safe for unprotected battery?

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radiodus
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Does USB charge flashlight is safe for unprotected battery?

I have MHVAST TS70 and ACEBEAM EC65, which have USB-C charge (2a) mechanism.

I will order unprotected high current battery(Golisi S43 IMR 26650, Molicel P42A 21700) for those flashlights.

But I can’t trust usb charge flashlight’s mechanism.

Does usb charge flashlight’s mechanism is safe as external charger?

Or should I use external charger when I charge unprotected battery?

Edited by: radiodus on 09/05/2019 - 12:10
Lightbringer
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Generally, they all use the same chips to do the charging, whether in a separate external charger or in the light itself. Of course, variances in resistance, etc., will prod one to (over)charge to 4.25V and another to a nicer 4.15V.

Best is to just try it. Charge the cell ‘til it’s topped off (green light or whatever), then immediately pull the cell and measure its voltage with a meter.

Those variances exist in “protected” cells, too, and might not cut off charging ‘til the cell’s horrendously overcharged anyway, so that “protection” doesn’t really buy much. Just keeps the cell from bursting into flames.

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BlueSwordM
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@radiodus, these flashlights have been tested to safely charge any lithium-ion cell safely.

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

SJSHINE
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The same way to use a unprotected battery. Usually manufacturers recommend you using protected ones as there is more risks in using unprotected ones.
Some flashlights are even not compatible with unprotected batteries.

BillyBobJoe
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SJSHINE wrote:
The same way to use a unprotected battery. Usually manufacturers recommend you using protected ones as there is more risks in using unprotected ones. Some flashlights are even not compatible with unprotected batteries.

Really? It seems like I see more lights that are not compatible with protected batteries than the other way around.

WarHawk-AVG
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Usually becuase protected are usually a few mm longer than regular 18650…instead of 50mm long they are like 53-54mm long

SKV89
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Most lights are not compatible for protected and even if you can fit it in, there’s a high likelihood the springs will get pushed in so much that there will be permanent deformation resulting in less pressure against unprotected cells and less output. However, the EC65 is one of those rare lights that are designed for protected cells and Acebeam is a premium brand. I really like how small the EC65 is considering it is made for the super long Acebeam protected 21700 and comes with USB-C charge. Only thing I don’t like is the tint on the Nichias. Too green.

Scallywag
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WarHawk-AVG wrote:
Usually becuase protected are usually a few mm longer than regular 18650…instead of *65*mm long they are like *67-69*mm long

My corrections in bold. 18 is diameter in millimeters, and 650 is the length, in tenths of a millimeter. The same holds true for cells like a CR2032, it is 20mm in diameter and 3.2mm in “length”

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