7G5CS Flashlight. I need help

hi to all bro n sis out there.

i had this 7G5CS crelant for the pass one year.
seldom use. only recently i had hardcore night fishing.

i had a problem. When i on the torch for 20minutes. i will blink 3 times. and followed by second the torch will blackout.
i did try again to on it. but it takes sometimes to recover.
i did some searching, but i cant find much info.

use to stay for 40 minute. but after 3 night fishing trip.
the 4th trip only last me for 20 minute and i totally in darkness. and have to wait till sunrise to go back hm

overheating? battery still good as it still runs on my Nitecore HC50 perfectly.

how do i solve my problem. any advice?
or else this flashlight will no long serve my purpose.

thanks in advance.

please help.

batteries used are nitecore 18650 2600Mah.

I would check the voltage on the battery with a meter.

adnj said:

I would check the voltage on the battery with a meter.

Click to expand...

i have 3 sets x 2 18650 nitecore battery.

seems to give the same result after the flashlight is on for 20minutes. after. swapping to new battery still give me only average of 5minute and the problem came back.

The 7G5CS has low voltage protection and shuts down with 18650 batteries installed. Reviewers have seen 40 minutes runtime on high from a freshly charged battery. If you are recharging your batteries, you would have to be able to check the battery voltage fresh off the charger. It should be 4.2 Volt's for most LiIon Rechargeable.

If a fresh, fully charged battery isn't working, your light is defective.
... Clean the switch, contacts, Springs, etc., with Deoxit
... Else you my have a defective driver

If the fresh battery is coming off of the charger low then your battery or charger is defective
... check the charger's voltage
... If the charger voltage is okay then the battery is defective
... Else the charger is defective