The Tenergy 9.6V 1600mAh Butterfly is a NIMH Battery which is a standard in airsoft today. This Battery is a 9.6V battery which means that it will have a faster firing rate than a 8.4V battery. These Types of Batteries fit in a large number of gun types including the Crane, Front Wired and Full Stock Guns. With these batteries you should use a smart charger to charge your batteries to avoid any damage to the battery. Smart chargers can help to enlongate the life of a battery, that way you can be airsofting more, and for longer durations.
Alternate Look-up: NIMH9.6V1600B