U4 could be some sort of boost converter for the USB output, the other components could be MOSFETs or whatever. You can buy plenty of electronic components at low prices on eBay and/or AliExpress. However, unless you can properly diagnose the circuit board and you can univocally determine the required components to change my personal advice is don't bother, samalheiros. Grab a new one. Certain AliExpress sellers ship to Brazil.
Cheers ^:)
P.S.: it is a tad hard for me to fully understand what happened to you, I think you tried to set up some sort of 3S Li-Po battery stagedly connected to rails 2, 3 and 4 but something went wrong. This charger wasn't designed with :facepalm: such a thing in mind, so no surprise something blew up. Next time stick to charging each stage independently (1S, 2S, 3S) that works for sure. :-)
Thank you very much for your attention. What you have reported was just the mistake I made trying to charge 3P lipo. I have already ordered another Liitokala 500 at Aliexpress, but unfortunately it is taking more than 4 months to receive it at my residence. The brazilian mail service are having many problems. As my charger was recently purchased and the new one will take a long time to arrive in Brazil, I would like to try to fix it. Could you check in the circuit of your Liitokala what is the number of the component called “U4”? In my Liitokala charger, this one has been damaged and I can not identify its number. Do you know where may o find the circuit map of that Liitokala 500 charger?
Thank you a lot, Barkuti. I’m reading a lot about this problem and you helped me a lot. I’ll try to fix my liitokala just for fun, I have already bought a new one.
These are currently on sale on Aliexpress official Liitokala store. I just paid $18 with 12V adapter. LINK
Just note it won’t be shipped for at least another week because of the Lunar New Year.
I would say none or rather very small.
There are very few chargers that will serious over charge batteries when left in them for longer time and Lii-500 is not one of them.
And overcharged batteries do seldom exploded, they usual vent. As long as there are no sparks or very hot items nearby, this is uneventful.
Hi everyone, I have a problem. I have charged 18650 batteries with my LiitoKala lii-500 device. 18650 battery was leaking. Then the MODE key and the CURRENT key did not work. Only with 500mA doing normal charging.
Which circuit of the device may be defective. Help please
Shewki please, edit your maiden post. It seems you copy pasted some sort of forum insert in code from resmin.net. This is inadequate and the layout of this page is now totally @#$%ed.
Though I don’t have a photo, I wanted to mention that a Sofirn 21700 4000mAh cell will fit into the Lii-500 Engineer if you force it a bit . It’s a tight fit, but there is no damage to the charger or cell if you slightly force the cell into the slot (I was using slot 4 in this case).
Instead of inserting the tail end fully into the bay, it’s best to use the edge of the tail to push the slider all the way back and then work the cell into the slot by sliding it somewhat parallel to the charger rather than rocking it in the usual manner. There will be some resistance when the flat top comes into contact with the positive terminal, but it’s not severe enough to be concerning.
Hello, I left my device for months with 18650 batteries on it.(didnt connected power)
When I tried to use today it only shows usb icon on the screen and doesnt charge my batteries . Usb charging working (tried with my phone).
Is there any way to fix it?
Wellp, it could be that it isn't receiving input power. Try another 12V power supply (the car adapter, for example). Check if the input connector is in good condition, etc.
. It’s a tight fit, but there is no damage to the charger or cell if you slightly force the cell into the slot (I was using slot 4 in this case).