Makes a solid impression overall. Mosfets G045N03. Driver chips are not marked. My guess, without going into too much detail (lazy), is probably just a simple square wave generator. Possibly an op-amp oscillator. This device is not "intelligent", it just keeps mixing the capacitors. However, this is not so bad. It just works. Initial reviews of the small battery while charging seem great. within the specified 5mV. but then again, these are new batteries and might just be a good match. The big downside is the noise. I ended up replacing the capacitors with others for unrelated personal reasons, but from what I can recall the original switching frequency was around 6.3kHz, which was audible. After replacing the capacitor, the frequency was 5.2 kHz (screenshot of the sight). If it's indoors or in a shed or something like that, it's not a problem, but you don't want it to be where you're wasting your time. The original capacitors are not branded. Personally, I would not operate the thing with the specified 5A balancing load. This is quite a large ripple current.
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