Installing AA Batteries
Instead of the Lithium-Ion battery pack (Installing the Lithium-ion Battery), you can use four alkaline, NiMH, or lithium AA batteries with an optional AA battery pack (not included). This is useful when you are on the trail and cannot charge the Lithium-Ion battery pack. Use NiMH or lithium batteries for best results.
The AA battery pack contains two parts.
Parent Topic: Device Overview