Re: Chinese made 12v 6 amp lead acid battery charger info
That's one reason I wanted to post that. In most situations, that may be fine. Just want to charge a battery right quick and then put it back on a mower or in a car to run it. In a RV, which is a good example where this would be a serious problem, these chargers would not work the way one intends for it too. My PowerTop charger would do the job a lot better, has more amps etc but mostly because it monitors the battery. I might add, this is something I just noticed today.
I wish I could edit the first post and...
dalek1967
Member
Last Activity: 09-10-2023, 07:47 PM
Joined: 02-20-2023
Location: local
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Re: Chinese made 12v 6 amp lead acid battery charger info
I have learned something else about these chargers. If you leave a battery hooked up but have a small load on it, the charger will charge until the charge is complete then it cuts off. That's normal and expected. Thing is, if the battery charge drops because of the load or the surface charge moving deeper, it has yet to cut back on and top the battery off. Basically, once it charges and cuts off, it's off. The display is on but that's it. I confirmed this by measuring the voltage on the battery. Most trickle chargers I've...Leave a comment:
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Re: Chinese made 12v 6 amp lead acid battery charger info
I never have but I do have one large enough to put a car battery in even. It has four of the noise makers in it. I call them that for a reason. It is really loud. Cleans my eyeglasses spotlessly clean in seconds. lol I bought it because a carburetor will fit in it easily, even a large 4 barrel one. Cleans firearms in just a few minutes too.
Next time I have a battery in bad shape, I may try that. After all, nothing to lose really. I'd think it would do something but not sure just what. It may be good, may not....Leave a comment:
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Re: Chinese made 12v 6 amp lead acid battery charger info
Thing is, my real experience says it did. I've had several batteries that were weak to the point they were about useless and after a lot of desulfation, they work very well. No battery will return to 100% new but they do get to a point where they can be used as intended. It does take a lot of time tho. A car battery can take months of desulfation to get back to a usable state. One of my biggest uses, preventing sulfation. I do the same as off grid people do. I use these on a regular basis to prevent sulfation from building...Leave a comment:
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Re: Chinese made 12v 6 amp lead acid battery charger info
The one with the large inductors worked on that old battery and several more like it. When you have a battery that can't handle a load for any amount of time, put on the desulfator and a trickle charger to keep the battery charged and over time it is able to last longer and longer until it lasts close to a new battery, it is working. It's hard for anyone to convince me what I see with my own eyes work, isn't working. The one battery I used as a example is only one of several that I've done that with. I might add, many others...Leave a comment:
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Re: Chinese made 12v 6 amp lead acid battery charger info
Yes, batteries fail for several reasons. Usually mine fails due to a shorted cell, often in something that gives it a bouncy ride. Sulfation is a common one tho. I didn't think they worked either until I used it on several batteries. The example in post above was only one of many I've done this on. I have seen this work but it does take time. The example battery above was over a two month or so period of time. It did improve pretty fast at first but it took a while to get to where it is now. Despite it being about 20 years...Leave a comment:
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Re: Chinese made 12v 6 amp lead acid battery charger info
The circuit I built mine from is open source. I downloaded the gerber files, had the boards made. Then I put the components on it that I got from Newark or somewhere and tested. There is videos where people, including the guy that did the circuit, have put scopes on it and it does produce a spike. The one I built has a diode and capacitor that holds that spike so you can tell if it is finished desulfating or not. If you measure the spike and it is 28 volts and hours later it is still 28 volts, it has likely done all it can....Leave a comment:
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Chinese made 12v 6 amp lead acid battery charger info
I posted another thread like this for a TV power supply. This is for information purposes for anyone who has a bad one and wants to repair instead of replace. There is no model number on these but internally they appear to be the same, fan being the only difference I can find. If a component is damaged and can't be identified, this may help. One I have has the brand name XinJieBao on the front above the display. The other isn't marked.
My impressions. I can't say for sure on the chips and such but the HV capacitor is a very low quality one if I think. I tried to google it and also... -
Re: replace mosfet question
I'm not a MOSFET expert by any means. My education dates back to vacuum tubes to transistor transition era, mid 80's. However, I've played with them a few times. From my understanding, the ESD addition on G to S is to protect from voltages outside the normal range that the device would be exposed too. Example, someone walks across the carpet and then touches metal on the device and they get a good jolt from it and it passes through the laptop. I would think the extra protection wouldn't do anything until something happens outside the tolerance of the...Leave a comment:
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Re: IdeaPad 5 15ARE05 Possible BIOS message and doesnt boot
I'm a Linux guy so I don't know much about windows. I did a little digging and it appears the error can have a few causes. The main one is a bad or corrupt file. That can be caused from a drive going bad, file system problem, a improper shutdown or just something went wrong somewhere and it got corrupted. The biggest thing is how to fix it. I found the video linked below. Since I don't use windows, I didn't watch it but I saw it mentioned in several places. Sometimes a video where you watch someone do something is easier...Leave a comment:
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Re: ASUS Q502L Keyboard not working
Have you tried another port, USB plug? If possible, try another computer. If it fails on either of those, especially the later, then it may have a problem.Leave a comment:
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Re: LG 42LN5400 - restarts every 10 sec
I have a 32" LG TV that was acting weird. Sometimes it would come on and work fine. Sometimes I had to unplug, wait 10 seconds or so and plug back in while it had a signal and it would come on. Sometimes it would upset my computer and make the video card disable the port. To say it was flaky is putting it mildly. Finally, I took the back off and discovered that the caps were going bad. They were swollen a bit but working enough that sometimes it would work. I got the info off the caps and ordered replacements. When they came in and I...Leave a comment:
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LG 32LF11 P/S Part # EAX55176301/10 Cap info
I recently replaced the caps in my TV. Model and power supply part number is in title. I wanted to upload the info in case it will help others. Example, TV works but sort of iffy and don't want to disassemble or caps blew up beyond recognition. If one gets confused as to polarity, this should help too. The caps are about gone but still in one piece, just expanding a bit.
With those images, anyone who can drive a soldering iron should be able to make repairs, even if the caps went to dust.
I have other pics of other boards for this TV if someone needs them. They...Last edited by dalek1967; 02-22-2023, 01:21 AM. -
Re: New Members - please post your introductions here
New guy here. Took TV repair back in the 80's. Let's just say things have changed, a LOT. Tubes was the thing back then and transistors were just starting in TVs. I was taught some about transistor TVs but it was limited. TVs also weighed enough to require two people to move them. Still, I've had electronics as a hobby every since before I took TV repair. I've designed and built pump controllers and such for personal use. This was also back in the day when we used dry transfer to make our own PCBs. So, somewhat a old guy, sort...Leave a comment:
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