There are many good batteries and companies (as well as many bad ones). One of the best bang for the buck companies to deal with is generally SMC. Either the 5200 or 6500 packs here are fairly common in eBuggy vehicles. I generally run the 6500 as I will never ever worry about power or the pack being stressed or being able to make time even if the main is long and there is a long warm up period and long after lap in a qual. The 5200 should balance the vehicle more side to side, though I haven't found problems from that with the 6500.

http://www.smc-racing.net/index.php?...ory&path=67_96