The Hybrid 8 is the most versatile hybrid pack. It can not only be equipped with 8 AA size alkaline batteries or 8 AA size NiMH batteries, but also with a Green Force 10 cell rechargeable NiMH pack which delivers even more power (2.2 Ah). Just like the Hybrid 4 and 12, the Hybrid 8 pack can be equipped with a handle or an umbilical. The pack measures (L x Dia.), 7.36" x 1.93" (187mm x 49mm) and has a voltage of 9.6 or 12 volts. Pack is made of heatproof polyacetal (delrin) and they obtain their water tightness by using durable NBR O-rings. They are equipped with the TOS system.