I like both Maha and Ansmann chargers
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. The Maha is more fun for the geek in me, since it can display total capacity and has various programs, as opposed to indicating dead/charging/charged. But both seem to charge just fine. The Maha is a bit more picky about dodgy batteries. I chose the Maha over the Lacrosse because of reliability issues at that time (might have been the fire issue).
I didn't mean to imply that all Voltcraft products are bad, as usual with these companies that slap their own label on Chinese stuff, it's hit or miss. I'm sure they are lucky part of the time. My experience (and the experiences of other people I know with Voltcraft test equipment) is that it's usually big on shiny features, but not so great for real-world use. For example, a scope that goes down to 2mV/div, but produces so much noise that it's hard to discern any signal at those levels. Might as well not have those low ranges.
Another example is a 4-in-1 function generator/frequency counter/power supply/DMM unit that I got cheap used. The function generator is usable, although the pots feel lousy compared to Tek and HP/Agilent stuff. The specified range is 10MHz, but you won't get anything resembling a square or triangular wave anywhere near that frequency. The amplitude varies a lot with frequency. The frequency counter seems fine, but I'm not big on RF, so I rarely need accurate frequency measurement. The power supply is a standard LM723 design, which drifts a lot, and the multi-turn pot skips certain values (I believe I have a hard time setting anything between 1.0V and 1.7V). The cooling is badly thought out: the power supply is cooled by a heat sink on the back of the unit. There's also a loud fan, but that's only to cool the power supply for the frequency counter/function generator. Those can be switched separately, but the fan is always on full power, even when they're switched off. The DMM takes multiple seconds to decide on a value, the continuity test takes like three seconds to decide that I shorted the probes. It has several features like relative measurements, min/max/average and data hold, but the interface is so bad, that I rarely bother to use them. Plus it runs from a 9V battery, even though it's a huge 30lbs unit that's definitely for bench use. This means that I sometimes have to change the battery (on the back behind my other equipment). It should have been line powered like the rest.
It's OK for the price, but I wouldn't consider it high quality. They may re-badge some good stuff, but I wouldn't consider the fact that they slapped their name on it a sign of quality.