looking for xtra batt for tdi oz pro

Anyone suggest somewhere in australia that will custom make a battery pack for a tdi oz pro at a cheaper price than the whites one? $320 for a whites battery, there must be somewhere that can compete with that, surely? Tried J car....no good, will go to battery world tomoz and post results. Cheers dave.

4 x 18650 Li-Ion cells in a flat 4 cell battery holder and you got a battery pack suitable for a TDI-Pro.

Really? What about the the wire and plug in? Sorry, im not savvy with this kind of stuff, 4 cell battery holder, great, but the wire that comes from the pack to the unit is what im refering to. Thanks though!

Ivan11, thanks for the tips, went to battery world, 4 x 18650, s in series will give me the 14.4v but at 2.2 amph, about 1/2 the life of the standard pack. What was interesting though was the geek behind the counter, who was really interested, came up with 2 othe suggestions,

1. Hook up 5 instead of 4 for 18v at 2.2 amph, that will give the tdi more punch, or depth.
2. Hook up 8 instead of 4. 2 banks of 4 in series, then the 2 x 4 cells hooked up in parralell to give a standard pack of 14.4 v at 4.4 amph.

Thae batteries are about $21 ea. Total cost including labour for the 8 cell pack, pretty close to 300 bucks, the Whites pack, about $320....oh well, worth the exercise I suppose.
Thanks for the advice.