new lamp found

[potholer]

Well, that one seems to have less electronics in (though there may be stuff on the other side of the board) though it does look like there's something battery-related in it.

Given that this thread's light has similarities with both the others linked to (external battery like the last one, pushbutton switch like the integrated-battery one), I guess a look inside the headset might be handy, if it charges via the headset.

 

[ghost]

The Marcmart lamp may be good for a while, but the pushbutton switch may not last all that long (although I hope for your sake that I'm wrong about that). With the Chinese lamps it's always best to go for a headshell with the Oldham-style rotating blade - this is intrinsically reliable and can be adjusted/replaced/repaired. It's sometimes hard to correctly identify the blade-type switch - you may end up with the rotating drum-type switch which is inferior and not robust.

Here are some units - the two with belt battery have the standard K-series headshell, the odd cordless has a K-series headshell with re-engineered moulding that incorporates a big integral battery box, and the slimline single-18650 cordless has a unique moulding different to everything:

Here's a comparison of the not very good drum-type contact with the very robust blade-type (converting the drum to the blade is 100% straightforward if you have the correct parts, which I usually do):

Here are the components of the plain gnurled-knob blade switch (there is also another type of blade switch which is partly interchangeable - the switch knob (wing-type) and blade must be swapped as a set):

Hope this is educational and/or useful... 

 

[Addy]

Does this light charge via the headset, or straight to the battery pack?

It does allow through the headset charging - mine's 'cooking' that way at the moment.

The charger supplied connects directly to the battery pack - there's a small rubber bung to prevent crap getting in. I think I'd also tape that over when in use underground.

There's no additional charging circuitry in the headset although at present I've not sussed out the 'regulation' which appears to be purely resistive.

Current drawn from the battery is around 160mA so about 500mW - no surprise therefore that has a good duration.

 

[Addy]

Current drawn from the battery is around 160mA so about 500mW - no surprise therefore that has a good duration.

...however, the " 5W Power LED Miner Light Headlight Mining Lamp F Hunting Camping Fishing Camping " lamp from the original eBay ad must be using different Watts to the ones I know. 

 

[potholer]

...however, the " 5W Power LED Miner Light Headlight Mining Lamp F Hunting Camping Fishing Camping " lamp from the original eBay ad must be using different Watts to the ones I know. 

I noticed that, and assumed it's using the old trick of referring to the maximum power handling of the LED, not what it's actually being run at in the light itself.
There were loads of lights in the old Luxeon days described as "uses 3 Watt LED!" even when they never really ran at anything like 3 Watts.

Though realistically it's more like 4 Watts at max power, it'd probably be possible to stretch the max power for an XP-G to about 5 Watts or so by favourable assumptions of specs (by assuming the forward voltage was somewhat higher than it is typically highly likely to be).

 

[Burt]

Just bought one of these:
http://www.customduo.co.uk/Pages/PitlampOmni.aspx

Flippin' brilliant!

tested in 3 caves so far; the full flood option is great for crawly passages and the high beam lights up everything else. Theres lots of other light combinations but these 2 are the most useful I've found.

Highly recommended for a budget mega-light.