DIY lithium battery pack for LED lantern flashlight USB charger conversion
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- Опубліковано 14 лют 2020
- This video shows how how I converted a Harbor Freight LED pop-up lantern double AA batteries to a 1S2P lithium battery pack. This conversion uses a TP4056 bms to charge and protect the cells from over charging and discharging. This board cost less then $1. The lantern cost $5. 18650 cells was harvested from recycled laptop batteries. This project cost only $6.
Harbor Freight Pop-up Lantern:
www.harborfreight.com/250-lum...
Heat Resistant Polyimide kapton-Tape:
www.ebay.com/sch/i.html?_nkw=...
TP4056 lithium battery charging bms:
www.ebay.com/itm/5pcs-5V-1A-M... - Навчання та стиль
I had a crushed lantern and took all the guts out and 3d printed a enclosure and 18650 battery holder, used the all parts to make a custom light to fit in my under-stairway closet where I have no AC outlet. Your video was my inspiration! I can slide it off the ceiling and charge it. A Big Thank you for guiding the way.
Bought the same boards cause I have 2 of these lanterns lying around. Can't wait to try this Friday. Thanks!!
I’ve been using mine for awhile now and it works great, battery last a long time, and it’s rechargeable. Good luck. It’s worth it and a fun project
Such a great idea. Thank you. I did it to mine and it's working great. I wish someone can design battery housing for 18650 battery, that would be amazing. I have seen one of Amazon seller modified their product for hybrid batteries (3 AA and one 18650)
Awesome! Thank you 😊
thanks, I am going to do the same
Very nice!!!!
I have a similar light and lots of spare 18650s time to solder. thanks
Why just not adapt it for 3 rechargeable AA 2700 mah batteries?
You don’t need any adaptations for those, unless you want to charge those using a USB source such as this video did. With the batteries you asked about, just remove them and charge them in a separate charger.
18650 has bigger capacity per cell than rechargeable AA batts. And since those li ions are wired parallel, you get twice or triple running time compared to AA batts.
Nice hack. Does the tp4056 has over discharge protection too? I also like your soldering tip. What is the proper name for those tips? That is the quickest soldering I have seen while soldering on 18650 cells.
Yes this one does have discharge protection. The soldering tip is a standard medium size tip that is worn out from use. I find that it works much better than a new tip.
They say that this lantern is water resistant, how true is it?
Does the TP4056 get hot when you re-charge both batteries in parallel?
Did you ever have a problem with the hot glue melting?
Have you considered an aluminum heat sink on the charger board?
---> I have several of these, just got them.
Not sure if they will over heat yet - Still investigating.
Thanks for a quick response in advance!
~J
These boards have a fix amp draw/output so it won’t get hotter charging batteries in parallel. Heat sink not needed as the draw on these leds is low.
the tp4056 is for a single battery, you will not have problems in the future?
by the way, excellent work!
Thanks. There’s no problem hooking the to4056 up to multiple batteries as long as it’s connected in parallel.
@@Lowegy Thanks for answering, you freed me from a great doubt, thank you very much
While charging does the light works ?
Yes, the light works while charging. You can charge with portable usb charger for extended battery life
lowegy will u please help me out ?🙏🏽
I’m tryout convert my lantern to lithium battery or a battery pack
My lanter takes 8D battery’s
What should i need ?
You first must figure how the batteries are connected. Are they all in series? Is there some series and parallel connections involved? Because that establishes how much voltage is being sent to the bulb. The types of lithium ion cells that were used in this video have about 4.2V output. And you then also have to figure out the protective circuit that is appropriate for the battery configuration you end up with.
Cool project! I saw these at the Dollar General and had the same idea; I secured the batteries to the base so they can't flop around when it's open, and added a 3ohm resister to limit the current (that dropped it from drawing the full 1A the TP4056 supplies down to .3A).
Not sure if these links are allowed, so replace the _ in the middle with a . and copy/paste:
i.imgur_com/ek5sFbn.png
i.imgur_com/bVzI7QE.png
Are the resistors adding runtime due to the lower run amperage? If so, I wanna add that! :D
Or you could buy rechargeable AA batteries or a rechargeable lantern/flashlight
Every hear the term recycling? Or just make more plastic junk and throw it in the bin?? If you already have a lantern or flashlight, already have an old laptop battery(I've had a few power banks fail but the 18650s inside have been perfect) then you need a tiny circuit board and some time. Plus it's fun to make things. This same project could be adapted to quite a few different AA/AAA powered devices if there's room for an 18650 or two.
cool another vid with soldering lithium cells, why you are not informing viewers that is is dangerous and shouldn't be done?
Thanks for your concern and comment. Nothing wrong with soldering cells so long as you are doing to properly. I have built many dozen battery packs and soldered over 1000 cells the past 10 years w/o any issues. Agreed, proper care should be taken when soldering cells.