The LCD voltmeter arrived. It's *much* better than even the red LED voltmeter. It covers 18 volts to 80, which is ample. It's very visible even in the strongest sunlight, which the red LED isn't. And it's also visible at night, because it has background lighting, but very gentle. And as an unexpected bonus, it only pulls 6 milliamps, compared with 14 for the red LED. 14 milliamps isn't much, of course, it's about half a watt. I'll be putting this on the bike today.
The package came marked as "From Ding Dong Feng", declared to customs as "Garden tools".