my local toys r' us is going out of business. while looking around i found a shitload of RC batteries. 9v 800 mAh and 7.2v 1600 mAh for 13.99 each w/ chargers. also i found a 6v SLA (no mAh rating on it) for $25 (no charger, would require some cable hacking, but sure enough a SLA) anyone interested in these? i may pick up the SLA as a festival battery, any idea how long this might power a UA-5 w/ phantom on for?