A gel-cel is safer than a normal lead-acid battery: I do not know how 
widely they are available - I know them from radio control aircraft 
starters.
Cheers
Allan Lees
Billinghurst, David (CALCRTS) wrote:
 
From:  Alan Gillanders
 A small sealed lead acid battery will set you back about $40 
and fits easily into a bumbag. 
While it is possible to obtain a spotlight for as little as 
$13 it is worth spending 10 times that for a really good one. 
You can then adjust the focus of the beam. I use Lightforce 
equipment for my tours. 
There is an advantage in having bulbs of different strengths 
to cope with different conditions. I use 30 watts in the forest
but 75 out in the paddocks.
    
 
I too have had good service from a Lightforce spotlight and a
sealed lead acid motorbike battery.  I changed to a 30 W globe
in the forest to extend th battery life.
        David
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