Ultrabright LED Emergency Lamp (Rechargeable!)

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Preparing for a calamity or planning to go camping in the vast wilderness? Make an ultrabright emergency light in less than 5 minutes! It glows 360° and is completely WATERPROOF!. In addition the jar's lid can be detached from the jar turning it into a compact flashlight! This is a simple project that uses a 3W LED and a BL-5C (Li-ion) Nokia battery. Macgyver's style!

It's completely rechargeable, via USB or wallwart (5v), only takes an hour to fully charge the lamp. If you remember my previous project "DIY Portable USB Solar Charger", you can charge the jar using a solar panel. Guys, it's free and renewable energy!

Top 10 Practical Uses (Must Read):
1st.) Portable Emergency Light
2nd.) Camping Light/ Lamp
3rd.) Floating Pool Lanterns
4th.) Nightlight (Sidetable Lamp)
5th.) Constant Camera Light
6th.) Waterproof Rescue Lights!
7th.) Solar Powered LED Lamp
8th.) Garden Props & Ornaments
9th.) Replacement for gas lamps
10th.) Halloween Lanterns (Modded Version)

Real Life Scenario (My Experience):
(11/8/13) - A Category 4 typhoon has entered the Philippine area of responsibility. Codenamed: Yolanda
(11/8/13) - The president declared a state of calamity, told to brace ourselves.
(11/8/13) - My parents told me to charge all our lamps, unfortunately 2 out 4 emergency lamps were broken.
(11/8/13) - I made a simple "Jar Emergency Light" in just 5 minutes!
(11/9/13) - Typhoon reached our area with extreme rain and winds.
(11/9/13) - 1:00am The Blackout Started, my 1st time to use the LED Jar :D
(11/9/13) - It feels so cozy to light up a whole room as if there was electricity!


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rimar200011 months ago
Always awesome, Casimiro!
ASCAS (author)  rimar200011 months ago
Mercurion92511 months ago
Awesome instructable!! It's really clearly written, especially considering the circumstances of construction :) Hope you guys are ok in the Philippines!
ASCAS (author)  Mercurion92511 months ago
Thanks! And yeah, the storm's gone :D I hope the people in the provinces are okay.

Hi, I'm from the Philippines also. I would like to ask whether the USB Lithium Charger uses microUSB or miniUSB?

Ren5171 month ago

Is it possible to use USB cables for charging the lamp??

Please Reply ASAP Thank you :)

joaqi8233 months ago
This helped me since storm #glendaph is here. We have the same hobbies! Because I also like speakers and quality audio and working on other ways to improve and harvest energy from other sources
Ben Thomas3 months ago

That is great and simple! To get some mood lighting, drop some marbles in there :-)

michaelgc4 months ago


muddu986 months ago
Igor227 months ago

Those 3w LED lights are prone to heat up pretty quick,and also tha recharchable battery doesnt like extra heat (either from charging itself+ the LED heat output),better thing would be to separate them from each other if possible.
On the other hand,its a great a fun project to do.Keep up the good work!

aalexander269 months ago
will it work for 2000 mah power source?
ASCAS (author)  aalexander269 months ago
basementhacker10 months ago
Here's my version:
I used a scavenged headlamp LED set and removed the charging LED from the picture. My charger is 6v and the battery is an old phone battery.
ASCAS (author)  basementhacker10 months ago
Neat! I can see you used 5mm LEDs. I bet they stay cool all throughout its operating time :D
Yes! But now I'm having trouble charging the battery. Could my circuitry be off? It's just the charger in parallel with the battery and lights. It was barely shining yesterday, so I plugged it in, and now the battery has no charge at all.
ASCAS (author)  basementhacker10 months ago
Do you have a rectifier diode installed (ex. 1N4007)? Diodes prevent the back flow of electricity. If yes, then try to check your diode's polarity.
No, but I can most certainly install one. Where does it connect, and does the size matter?
ASCAS (author)  basementhacker10 months ago
You can refer to the schematic from above.

Not exactly, but to be sure, attach a 1A rectifier diode (1N4001).
anmar0610 months ago
Didn't have time to look thru the comments but wouldn't it be better to attach the solar panel on the top and frost the jar so it has a brighter glow?
ASCAS (author)  anmar0610 months ago
Yes! I wouldn't recommend mounting the solar panel inside the jar. It's better of outside :D
jo'dell110 months ago
use glass etching cream to make the light diffuse might then be even more bright in a localized area
ASCAS (author)  jo'dell110 months ago
That's a brilliant idea! I'll try to find one in our local hardware store, if I do I'll add photo of the finished product together with my next update :D
D4v010 months ago
Waoo, something really simple and useful and isn´t dificult to do, i just have one question, the power source how many amps do you use ?? less than 500mA ???
ASCAS (author)  D4v010 months ago
950mah :D
bhvm11 months ago
very practical and useful! write up is good as well. please put a decent heatsink on that led. and putting it onto Battery is worse! they heat will destroy everything.
ASCAS (author)  bhvm11 months ago
I did, I'l post an update this Saturday :D
bhvm ASCAS11 months ago
Waiting mate.
BTW i've posted some LED and other instructables. Check them out and let me know how do you like it?
ASCAS (author)  bhvm11 months ago
I'm so sorry :)) last week was our term exam. I'l post it tonight.
vprasad11 months ago
Dear Angelo
in future you will become a good scientist
its really nice kindly tell the power led make & datasheet
ASCAS (author)  vprasad11 months ago
Thanks! Here:
vprasad ASCAS11 months ago
thank you
BOBCAPATAZ11 months ago
Dear ASCAS, My compliments on this Instructable --- and Thank You for sharing such a useful item with all of us. Keep up the good work.
jacobpv11 months ago
cool..really simply..hidden...idea
ASCAS (author)  jacobpv11 months ago
Hangfire11 months ago
Excellent instructable!
ASCAS (author)  Hangfire11 months ago
ASCAS (author)  Hangfire11 months ago
vectieba11 months ago
Awesome Instructable! Have you checked how long it lasts on that battery?
ASCAS (author)  vectieba11 months ago
Unfortunately mine lasted for only 2 hours, probably because the battery was too old and the LED consumed a significant amount of electricity. You could get more usage time by adding 2 more batteries in parallel.
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