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Lead-Acid Battery Powered Table Lamp Modified To Use Lithium-ion Battery

By Jestine Yong on November 20, 2021

This rechargeable table lamp my family use to light up kitchen whenever there’s power failure. It uses lead acid battery for power, which I usually change whenever battery is bad, however because it’s fake of same battery that full market now and it’s charging circuit does not have anti-over voltage charge, I decided to modify it. I had modified it in the past when the original board got burnt, to charge directly with the use of phone charger, having removed the original board, picture below:

Now I’m using 5v lithium-ion battery module which I purchased from Aliexpress to modify it.

I connected copper wire to all points,

using lithium-ion cell holder case,and then powered it with 5v phone adopter: see results below, if you zoom picture you see charging red led light glowing.

I then glue the new board inside lamp case, then charge it for 1hr 17mins before charging led change to yellow indicating battery is full.

Picture below of finished repaired work.

This article was prepared for you by Imoudu Onwumah from Nigeria. He is 62 years old and has just 3 years experience in electronics repairs. I started career in hotel industry as a chef, but then I was doing repairs only in electrical repairs as a hobbyist. In 2018, I decided to learn about electronics which through Jestine’s electronics e-books and holding my hand, am an electronics techie today.

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Note: You can read his previous article on Water Standing Fan Power Supply Modified

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9 Comments

Waleed Rishmawi

November 20, 2021 at 2:41 pm

a very good upgrade on a LED Light device. thanks for sharing and have a blessed day

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Parasuraman S

November 20, 2021 at 3:40 pm

Very useful indeed! Good idea and many thanks for sharing. I have this lamp and would do the modification as and when a replacement becomes necessary!

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Albert van Bemmelen

November 20, 2021 at 6:43 pm

I also have many 18650 Lithium-ion cells in my home, mostly in many portable devices. And also have bought several 12V 3S charger boards (for 3 x 18650 cells in serie). But sadly they had China design bugs and also wrong soldered or missing parts why my 12V batterypack(s) probably never stay completely charged for very long and hardly are trustworthy when charged or used.
And I keep hearing in the news about many burned down factories and house fires were Lithium battery packs are involved. Like at electric scooter depots and so on. And I am very careful to prevent any fire that might happen and starts when I'm not home. That is why I keep about 20 of those not used yet new 18650 cells in a special fire proof ARRIS LIPO BAG. Also because Lithium fires once started also are very hard to stop! Even by professional fireman!

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Anwar Y Shiekh

November 21, 2021 at 2:44 am

I have always wondered about running a UPS on lithium. You may click here to view

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Mark

November 21, 2021 at 12:45 pm

Well done!

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Imoudu Onwumah

November 21, 2021 at 9:39 pm

Albert,

Thanks for your comments and informations.lnfact because of rampant of fire incidents caused by lithium-ion cell,I make it a point of duty not to charge at night when the family is at sleep in case of fire.

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Yogesh Panchal

November 21, 2021 at 9:41 pm

USB Battery charging Module is very useful now a days,
Thanks! for sharing your experiment.

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Imoudu Onwumah

November 21, 2021 at 9:48 pm

Waleed,Parasuraman,Anwar,Mark.

Thank you all for your comments.

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Gregory Brettell

November 23, 2021 at 4:36 am

Great idea ... thanks for the post.

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