OK, I need a new one.
I could have had the same again Mashin Made in Taiwan model for 1500NT ish, or a fancy one with pulse and rescue charging and a battery test function for about 4000 NT.
OR I could get a Made in China (almost certainly) pulse charging model for 400NT online (or 2000NT from the battery shop I got the last one from, who are apparently 'avin an inscrutable larf)
Much as I hate buying Chinese, I…er…bought Chinese, a global weakness that should be addressed internationally, but evidently isn’t going to be.
Gets good reviews on the Internyet under various names and seems to be working OK,
Doesn’t have a “dumb mode” for recharging a flat battery (I think the “rescue” mode of the fancy Mashin model may be essentially that), but I usually have another battery I can use for voltage spoofing. Dumb chargers seem to be rare, big and relatively expensive these days.
Early days, but so far pretty impressed with it, apart from being Chinese. .I THINK it does constant current, then constant voltage, then trickle) . According to the manual (only slightly Chinglish) its not suitable for long term maintenance charging, and pulse charging can only be manually selected, but for about 10 quid thats OK.
Not a direct copy of anything else I’ve seen, since its fan-cooled, (which I suppose is a potential failure point, being a moving part.).
Plastic body so the apparent cultural aversion to earthing isn’t a factor
One oddity I’ve noted is that when you power it off the temperature display(kept alive by the battery its hooked to) starts going down from zero. Think I’ve had it down to about -40C, which would be a pretty good trick if it was true.