I have the Ozito Brushless 2 x 18V chainsaw mainly for camping (I also have decent petrol saw to compare it too) It is actually pretty reasonable.
some of the reasons I think it's worth a look are.
-Price the skin is only $199
-Warranty, 5 years on the saw, if anything goes wrong with it you can just go to the nearest bunnings and swap it over for a new one, If you are travelling with other ones it is likely to have to be sent off for repairs, how will they get it back to you when you are on the road?
-The Ozito 18v saw, by comparison, is a bit average by all reports. I think it is difficult to draw enough power from a single 18v battery to be reasonable, I suspect this is a limitation that will apply to most 18v saws.
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Batteries, Bunnings regularly matches Aldis $40 for a 4ah battery whenever they advertise them, which is usually at least a few times a year. Compare this to other brands.
- A negative is the length, a workaround for this though is as due to the toolless tensioner, it literally takes less than a minute to take the bar off and put it back together again so I store it in a bag, with the bar removed and it's pretty compact. The bonus is you then have a reasonable length bar should you ever need to cut anything bigger.
- Another potential negative is no 12v charger, as others have pointed out though, an inverter might be the better option.
A point I will make about all battery chainsaws though is that they are lower in power than their petrol counterparts, this is less noticeable with a sharp chain, a dull chain though will chew through the batteries and struggle to cut.
This is also worth a watch
https://www.youtube.com/watch?v=oI9gAw4AhJk someone else once did a comparison between a reciprocating saw and chainsaw for camping, but I can't find it at the moment.
What suits me is likely different to you, but hopefully some food for thought.