It occurs to me that I haven’t told you about this – don’t really know why.
Anyway, after a lot of searching I finally found what I was looking for at Amazon, but now they don’t stock it. Still, at least I knew exactly what I was looking for this time, and had no trouble tracking it down.
It’s the Polco Rechargeable Inflator.
It was originally supplied by a company called Grand Prix Legends and they don’t stock it now, either, but I found it at this company, for £31.50, rather less than I paid but, when delivery is factored in, there won’t be a lot of difference.
Not cheap, but it works very well and seems bomb-proof. Be sure to read the instructions before connecting the flexible hose – not hard, just counter-intuitive (if you doubt that, see comments – make it up you could not!). The only weak point is the tyre valve connection – it screws on, unlike the normal thumb-lock connector, but it gets the job done. And I suppose the hose could be longer, but that’s not a problem. It’s not overly noisy for indoor use, either.
If you use tyre sealant, always make sure the valve is uppermost, then remove the valve cap and, using a matchstick or something similar, release a burst of air – this will clear the valve stem of sealant (catch it in a rag if you’re indoors, or you won’t be popular), which would otherwise block the connector. Better yet, deflate the tyre and re-inflate to the correct pressure – this will ensure no sealant gets into the pump (this is what I now do).
There’s a small pressure gauge on the pump, which is accurate enough for our purposes.
There are cheaper rechargeable pumps on the market – Amazon have one, with 2 very poor reviews (one useful, one pointless) – which demonstrates what I’m about to say; you get what you pay for.
The battery, by the way, holds its charge well, which is a good sign – cheap, poor-quality batteries don’t.