Info needed Sony BP-81
 

Just bought KV8100 SONY- not received yet. Service manual no help. What was correct battery pack option. WHAT IS BP-81? Is this external pack that clips to bottom like the kv5100 had? Or is this battery that fits internally like kv5300? Or just a shoulder pack? Looks like a 24v pack. Service manual is no help. Please, I really need copy of owners manual