Author Topic: Batteries that don't die!! (Read 1814 times)

TrapMom502 · « **on:** March 31, 2018, 02:45:17 AM »

My boyfriend was given a cheap flashlight/jump pack by a friend. When you open the battery cover, it takes an 18650. Normally the flashlight would last about 3 hours on a full charge (1 LED). It was left in the pocket of his pants and made a trip through the washer. When he went to swap clothes in the dryer he noticed it because the flashlight was on. He then put it aside leaving the light on. Since then, we have not plugged it in or really messed with it at all. It has now been going for 6 days!! How is this possible?? Its the ongoing joke here that he has accidentally created a never ending battery. I should note that the insulator ring started peeling off. Any ideas on how this is even possible???

bykfixer · « **Reply #1 on:** March 31, 2018, 08:47:57 PM »

Welcome aboard trapmom.

That is what is known as a vampire light. One that runs and runs and runs, then runs some more.

Definitely a keeper for those times when for what ever reason the 'all night generator' isn't working in your city or neighborhood.

TrapMom502 · « **Reply #2 on:** April 01, 2018, 12:36:53 AM »

Its still on!! A vampire light? Will it ever die?? Wonder what would cause it to do this?

SG-1 · « **Reply #3 on:** April 01, 2018, 02:02:41 AM »

1865 batteries are capable of storing an impressive amount of energy. LED flashlights on a low lumen setting use very little energy compared to an incandescent light with the same brightness. There are many camping lanterns that claim a two week or even a forty day run time.

TrapMom502 · « **Reply #4 on:** April 02, 2018, 07:23:00 PM »

Still going strong. Whats weird is that it's never lasted more than 3 hours before this.

bykfixer · « **Reply #5 on:** April 05, 2018, 07:42:55 PM »

Hydrogen power?

adaptaluxsam · « **Reply #6 on:** May 04, 2018, 09:11:59 AM »

My guess is that it went through the wash it damaged some of the circuitry on the LED or driver. Does it look less bright?
If the current is very low then an 18650 battery could last quite some time!

For example, say your battery is 2500mah and the product is now only drawing 10ma. 2500/10 = 250 hours which converts to 10.4 days of life.

bykfixer · « **Reply #7 on:** May 04, 2018, 06:46:23 PM »

Check out the big brain on Bret!!

Thanks for the info. Makes perfect sense.

Batteries that don't die!!