New 10440 in manker E02 -> dead flashlight?!

Hi, totally new here! Thanks for having me.

So yeah, my releatively new manker eo2 III died on me when using a new battery.

Had the flashlight maybe a year using it sporadically. No issues other that the cell that was included depletes really quickly, like half and hour on the higher setting, and it’s really hard not accidentally depleting it and damaging the battery when doing stuff u need to get done.

So i guess I did that too many times and the battery died. Anyhow, it was anyways a bit to small in Ah so bought a couple of “Keeppower P1044C 570mAh 10440 AAA Protected” from flashlightgo.com

Right from the beginning the flashlight would inexplicably shut off, especially during the higher lumen outputs. At some point I was doing something under time pressure and flicked on the light several times when it shut off, and after maybe the 4th time it happened it shut off and has never started again.

Was it overheating and shut off for safety? It’s weird though bc it often happened just as i started using it, like 5 - 10 seconds in to using the highest lumen mode (not turbo)

The flash light had maybe 10-20 hours of total usage when it died.

Bought a new one, and can use the old one for spares if not fixable, but thought I’d get you guys input on what not to do again with the new one. Maybe it’s even repairable. Really happy with the little thing as long as its working lol.

Soooo, what do you think went wrong?

most likely this:
8. Max. Continuous Discharge Current: 1A

the protection circuit probably said “nah, too much” and cut the power

also maybe this:

manker:
∅10.5mm, height 43.2-0.6mm

Keeppower
14. Maximum Size:(D)10.6*(L)44.8mm(±0.2mm)

The Keeppower can be 0.8mm to 2.4mm longer than the manker. maybe fitment issues with the head, or squished battery, can’t tell from here. Has it worked with alkalines or NiMH?

Welcome to BLF!

Do you mean to say the light itself is dead or the replacement (keepower) cell?

I think @Dc38 onto at least one potential answer for you: the keepower is advertised as “protected” meaning it will have a small circuit built into one end of the cell to protect against over-charging, over-discharging and over-current.

This circuit may be what is tripping, causing the light to shut off.

A second suggestion (and what I’d suggest if it’s the light that’s not working) is that the physically longer cell has caused the driver board to flex and break.

I think if you’re running into runtime issues, the solution is to buy a bigger light, perhaps the AA/14500 version of the manker? A 10440 cell has 350ish mah while the 14500’s can have 1250mah.

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Ahhh damn never thought about it being the actual length that destroyed ut. But yeah it was the light that broke not the cell.

Should have written her BEFORE ordering a new one :expressionless_face:

And i all ready have a bigger light when i have my working pants/gear on and can fit it somewhere.

The 10440/AAA is always with me for doing stuff while “plain clothed” :disguised_face:

Worked fine with both NiMH and alkalines before going dead on me!

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Thanks for joining the party, Oskar!

Not sure this is the case, unfortunately we can’t defy laws of physics - if you want a small light, and like the UI, this one’s good!

Tim’s review suggests the e02 iii does 300lm for 2 mins then 220lm for another ~20min, which is pretty good for a 10440.

I think you’d struggle to find much serious competition in this format (If you’re shopping for alternatives, I’d advise you away from that Lumintop L3 thing, the stock beam is fugly).