Lithium batteries

[Benporaken]

I'm keen on dropping 4+ kg off the old '07 sporty, but I having trouble finding anyone on this crappy little island that lists one to suit. I'm not buying an overpriced one with a HD sticker on it that's for sure when there should be plenty of other viable options. Or is there a good reason I can't find one, like they don't like the charging system or something? Anyone here running one? What is it? Anyone recommend somewhere to get one? 

[Baggger]

Good question - I just had a look online too and could only find the rip-off HD ones. 
I can't find any other listing in NZ for them.
I'd also assume shipping them over from another country would be quite expensive due to the weight etc.

[Benporaken]

I've got a generic type one I'm gonna try. All the specs measure up, and it has a bunch of protections built in, so worth a shot I reckon.

[Benporaken]

Alright, it's in there. It starts well, and charges up to and holds right around 14v when it's running. It drops to 13.5 once you turn it off, though it may drop a bit more after it's sat for a bit.
I used one of these, hell of a deal pricewise;
https://www.marine-deals.co.nz/batterie ... m5EALw_wcB

Fits perfectly length and width wise, it is a bit lower in height, but that allowed me to stick a bit of the thick padding it comes with on top and slide the FP3 in there. The screws are a little smaller than the 5mm ones in the stock battery, and a little short with the washers and extra terminals. I had some with large enough flanges to work well, but it may be worth buying a couple of washers to cover the terminal properly if you use the ones that come with the battery, and/or some slightly longer screws.
 

[Dave]

Interesting! Going to look into buying a couple of these.
Thanks for sharing @Benporaken.