WAVLINK 450W Smart Battery Charger, 35A 6V/12V/24V Car Battery Charger

I bought this charger to replace one that failed on our battery backup system for our sump pump. I've had the charger for two days, and I'm convinced it was the right choice. It's used to charge our two LiFePo4 12V 100Ah batteries. They had drained below the threshold that the BMS would tolerate, so the batteries' BMS kicked in. I couldn't figure out how to use the WAVLINK charger to wake the batteries to start charging. The instructions have some translation issues, but one of the videos here tells how to do it. I used a jump starter pack to wake up the BMS (you likely don't need to replace the BMS board, which is a dangerous procedure). The WAVLINK charger then recognized that the batteries were connected. It took several hours, but the charger did its job, charging both batteries to their full capacity. The display is clear and easy to read, showing the progress in the charging cycle. The built-in fan dissipates the heat well. Although two O-ring connectors are included to make it a dedicated system charger, I am considering buying an additional output cable for automotive battery applications, because this charger will perform desulfation. That versatility in function appeals to me and certainly increases the value of the purchase.

I think this is the best charger I’ve ever bought for the money. It is extremely fast and the lithium compatibility is huge! I thought for sure it would feel a bit cheap based on price alone but I was shocked at how well built it is. The buttons have great tactile feedback. The alligator clips are powerful. The screen is easy to read. I think everybody could find a good use for this!!

Very good Charger. works on lipo batteries

The charger seems like it is working but I honestly don't know. The voltage on the display fluctuates but the amperage constantly flags an error code. I tried 24V LiFePO4 batteries and 12V flooded lead acid. I had the types, voltages, and amperage settings correct every time. The amperage field constantly displays the error code "41.E" indicating: "The output voltage is too high". I will be requesting a return. :(

Great product charged battery like new didn’t think it would work but it did love this charger

Charger works fine so far but be aware that it does not have a natural 0 volt BMS “wake up” capability in its LifePO4 or Lithium charging modes. This means it will not activate the BMS of a brand new lithium battery (the new battery will not function until this is accomplished). You can trick/force this charger to wake up an inactivated lithium battery by putting it in AGM/Lead Acid charging mode and activating supply mode after selecting the desired voltage. Of course this is a workaround that the instructions do not cover. Also, this charger is not capable of supplying the full marketed current ratings. For example, 24v 20amp hour mode only outputs 15-16 amps consistently

Great smart charger, ramps up/down amps properly (including the final "top-off" balancing stage), 29A max charging (full power) for my 150Ah LiFePO4 battery. Cons: runs hot (underpowered cooling fan) on one side of unit. Bit noisy.

I was very skeptical, but I was able to bring a car battery back to life. It started out with 100 CCA, when I finished charging/repair it had 760 CCA. The battery was a 800 CCA battery new. I definitely think this is a good buy!

Works as advertised. And yes, like other reviews the battery wires gets warm when charging at 35 amps.

Excelente, gostei.

So far, I like it, especially for the price. It might have a bit of a problem staying at 35A, but when charging, it cycles up close to that, 34.5A, etc. For my DIY shop use, which includes diesel pickup trucks with two batteries, I find it has adequate power to get me through while I am working on the trucks. I have not tried it on the newer ones that have an electric (non-serpentine belt) AC compressor asking for cool, max fan speed with all lights on yet, but I think if I am asking for that in 10-minute cycles, it should hold it and then charge the battery again after I have the request turned off.

Seems to be working well. Easy to set up. Was a better deal than similar items at auto shop.

I am skeptical about whether or not its truly 35A, based on other reviews i would have to assume its 30A. Buttons are a bit counter intuitive and take a bit to get used to them. AC ripple isn't bad, and the fan isn't to loud. Keeps my car at 14.6v while coding so that's the most important part for me.