I haven't tested NiMh's nor did I really plan to use it with them as I have other testers and have no multiple NiMh packs to test (yet). I'll PM you for further discussion on the Hobby Chargers as I don't want to pull this thread further off-topic.
Highly rated by who and more importantly……how? FWIW, I consider that an entry level unit. It’s got what, an internal power supply and a couple more amps power than the so-called ‘bottom’ 4-button chargers? It comes from the same place the others do….some unspecified factory (maybe factories) in China. You really need a RECENT and qualitative analysis before you can then HOPE it’s a decent unit. The seller can end up getting a new batch a few weeks, maybe months later that comes out of a different factory and the thing my not be as good, or it could be better. Hard to tell unless you have the tools to figure it out, few do.
I’ve spent YEARS in the RC forums. The vast majority of the people buying and using both lipos and chargers barely have a clue about either. If some guy says it’s great because it works for him (no data, no specs, no proof at all), then then next guy buys one and parrots the same response. It some kind of guy group hug I guess. Here’s a thread this type of charger now going on 228 pages and 3400+ postings. Most of it is the same questions over and over again.
I give you the IMAX B6 for a prime example. It’s one of the cheapest, therefore ( :bigsmile: ) the most often purchased. Dig a little deeper and you find out it’s the one with the most problems, and that’s ignoring the likelihood the operator barely knows how to use it properly. On top of that there are fake/counterfeit IMAX B6 that have lousy quality, poor components, poor assembly, and often comparable function. LOTS and LOTS of people are using them and don’t have a clue what the charger is actually doing with their battery. They think it’s great, until they have trouble.
There are very few people giving users the kind of quality testing on these devices that HJK is. Most of it is just ‘guy’ word of mouth, which is about as useful as BS at a bar.
Thanks flydiver. I'm now believing what your saying about all "the glowing reviews". Also perusing through the reviews it's all about "charging" with very little info on discharging.
When you do see discharging info it’s generally along the lines of, “What, my charger will only discharge at 1A?” (It’s even lower for 4S+ lipos.)
That info is clearly in the specs, generally not read, and/or not understood. So, it’s asked in the forums, again, and again, and again.
Or, “I tried to charge my 6S, 5000mA lipo at 5A and it won’t go past 2.2A! What’s the matter?”
Not having read the specs, the manual, or even understanding basic (and I mean basic) electronics they have no clue they’ve maxed out the 50W charger.
There’s a setting you can adjust to make the termination more or less sensitive. I had to turn mine down a bit. Works fine now, most of the time. I also have a better charger for NiMh but before I got the Opus I used the AC-6 for NiMh testing as well as general charging. Now it’s just easier to use the Opus, but it’s a different tool than the AC-6 for me.
FWIW NiMh termination is a LOT more difficult than Li-on. A lot depends on the size of the cell(s), age, and abuse level (internal resistance). There is no ONE perfect setting….unfortunately. You find one that seems to meet the requirements of most of your batteries and work from there.
I changed the termination setting when I first got the AC6 but it didn’t seem to make a difference. But I also have many other NiHh chargers so I didn’t spend much time looking into the issue. Now that I have the Opus I rarely use the AC6 since it gives unreliable discharge values and for charging NiMh cells is only good for 1 at a time.
So true about no one perfect charger or setting. That’s why so many of us have multiple chargers.