That doesn't sound right. A stinger SPP2150 has the following Ah ratings, 20 hour rate: 5.25A/105Ah, 5 hour rate: 17.8A/89Ah and 1/2 hour rate:130A/65Ah. At 55 Ah/1kw, This rather large battery would only be good for 1,500 watt amp? Give or take. Stinger claims the battery is good up to...