Don't bother with a 9.6
And 8.4 is good enough, all a 9.6 is going to do is wear our your gun quicker.
And I don't mean a "smart charger" like those black or blue boxes that you plug into the wall, I mean a good, programmable charger like a Pirahna or something like that.
Think of it this way; You could spend 60-80 bucks a year replacing dead batteries, or you could spend 100 bucks on a good charger and have your batteries last you 5-6 years.
Gun Technician and Tuner
Well versed in every AEG version and all major gas and spring systems.