I am using the LRP 4800 Lipos. Great packs, BRCA legal, fit perfectly with a small 3mm spacer under the battery posts. The cable sockets are slightly recessed so a cable with a Corally connector soldered on at 90deg fits perfectly under the top chassis brace. In addition the packs have the locating lugs on the bottom that fit into the cell cut outs in the chassis keeping the whole pack very secure.
Only issue is the cost.
James
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