A sign maybe Roar would allow higher voltages...
http://www.losi.com/Products/Feature...rodId=LOSB9834
18.5V 4000mAh 5S 25C LiPo: 1/8 Vehicles
At a Glance
This 18.5V 4000mAh 5-cell 25C Hard Case LiPo battery pack for 1/8-scale vehicles provides the power needed for competitive racing, while increasing running time between charges. The hard case protection keeps the expensive cells from becoming damaged externally. The pre-wired EC5 connector provides a quality connection and excellent power delivery.
Features
LiPo pack's protective hard-shell case provides extra safety
LiPo power provides increased speed and extended run times
Pre-wired EC5 connector provides quality connection and excellent power delivery
NOTE: This LiPo Battery MUST be charged with a LiPo Balance Charger. Losi recommends the Intelligent LiPo Balance Charger (LOSB9605
