I seem to recall that when using 'old-fashioned' rechargeable batteries (Ni-Cad, etc) it was recommended that from time to time they should be more or less run down flat and recharged to keep them in good condition. Does the same apply to modern Li-ion batteries?

Fenix HM 70R About 18 months ago I wanted a new headtorch, and thought that the Fenix HM 70R seemed to have a good specification, though I was a bit put off by the fact that it takes a large battery – a 21700 / 5000-mAh thing, as opposed to the more common 18650. I then noticed that Fenix sell...

On a rather desultory bimble round Skirwith Cave we noticed that, not far from the waterfall (on the way out) there is a samll inlet that dribbles down the right-hand wall, with what appears to be a hole at the top (~5 m up) that would be big enough to get into; however, we couldn't climb up to...

Out caving in the evening these last two Wednesdays, we've noticed quite a number of baby/young hedgehogs on the roads (specifically, the road to Bull Pot Farm and the road up Kingsdale), one of which, unfortunately, had recently been killed. Could we suggest that when out on the narrow country...

We found 4 maillon rapides hanging off a bolt at the top of the first pitch of Sell Gill Hole a week or two ago.

So, this has nothing to do with caving, but I get the impression that there are several computer experts out there who might be able to help me. I have an iMac, and when I run Excel it always tries to open in Text Edit, which is not really a problem most of the time, but today I was doing some...

Well, given the dry weather we've been having recently, the sumps between the upstream end of the downstream part of Bull Pot of the Witches and the downstream end of the upstream part of the system have probably been open for some time, now. However, we only got round to popping down there...

I've been thinking of buying one or two cheap flahsguns (Neewer or Yongnuo) but every time I look on the Internet it directs me to Amazon, and I don't want to buy off them; does anybody know where else these flashguns can be obtained?

Miranda and I are planning a weekend in N. Wales in the near future, when we plan to go walking. However, it occurs to me that a ?Plan B? might be in order in the (extremely unlikely!!) event of inclement weather, and we?re wondering about mine exploration as our Plan B. We?ve both done a lot of...

On the subject of leaving caves rigged with ropes, we went to Aquamole Pot today to find that all the pitches were rigged, with a note at the top saying something on the lines of: ?Do not use these ropes, as they may be removed at any moment; this is not a joke?. If you ask me, the sooner they...

I've just come across this somewhat enigmatic article in our local paper ? doess anyone know any details?

I just tuned in the telly to watch the news, and caught the last few minutes of the last night of the proms; while the orchestra and singers were well separated, the audience (?prommers?) seemed to be crammed in like sardines in a tin; another ?super-spreader event?, or ?get real, we gotta live...

I recall that some time ago there was a brief discussion on UKC by people planning to buy a new Mac computer; so ? has anyone got anything to say about their new Mac ? good or bad?

Hi, any Mac buffs out there, I have a desk-top iMac that I bought in 2012 and that still works perfectly well, apart from having slowed down quite a lot. This is particularly noticeable when first switched on. Does anybody have any tips as to how I could speed it up? (The operating system is...

It were wet in t'Dales today, but we were so pissed off with lockdown we decided to go for a walk anyway. Here's a snap of the dry valley in Lower Easegill:

I believe that 21700 batteries are the same size as 18650s. Is that right? If so, are they interchangeable? i.e. can I replace a 3500-mW-hr 18650 with a 5000-mW-hr 21700 and get 10/7 times more run-time?

Rumour has it that Wookey Hole has been extended (by 300 m); does anyone know anything about this?

Number 1: Clean behind glasses cabinet:

Karabiner and deviation cord found on first pitch of Gavel Pot.

Fenix HM 656R lost somewhere in OFD I on Saturday 14/9/19; probably somewhere on the 'Escape Route' or in the passages between the boulder choke and the Letterbox.