The EagTac default product sorting is by "Series" - which is based on head diameter of flashlight ("D" is smallest diameter, up to "M" series which is largest diameter).
Then, by Battery Size (AAA, AA, CR123, 18650), Number of Battery (1, 2, more) ~ smallest light to largest light ~ more info...
Download EagTac Catalog
/general information here ~ 3MB PDF File
NOTE: Models / LED specifications change frequently due to rapidly changing technology... see the specific model webpage below for updated information!
NOTE2: Lights marked as "rechargeable" include battery/batteries, a built in internal charger, and power cord to recharge the battery,
ALL other models generally have more than one choice for battery type ~ thus, it is up to customer to purchase desired battery/ies and/or battery charger separately.