Fenix HM65 R (1400 Lumens)
Fenix HM65 R, rechargeable LED headtorch, comes with one Lithium 18650 battery. Up to 1400 lumens output in 'burst' mode. Along with the HL55, this is the Fenix product we see as a primary caving light.
With four settings,two individually controlled LEDs, and a brighter 'burst' setting, this seems to be a nice balance between size and performance at a very good price.
Using two press buttons, one for each LED,the 'burst' setting is a long-press feature i.e. it turns off when you let go of the switch. The torch fits neatly on the elasticated headband (will fit around a neck, and on a helmet at a stretch). It has a regulated output and polarity protection.
Weight is 100g without the battery, the HM65R is c.8.5cm long and c.4.6cm wide; so it really should not be very noticeable to wear as a backup; and very light indeed on the helmet. It is also waterproof to 2m depth, is made of alloy for abrasion resistance, and recharges through the headset BUT although the port is in the body of the lamp, it does not connect directly with the battery, which we think will be more durable than those models using ports directly in the battery.
Also the HM65R can be fitted with spare Li Ion batteries, so duration on a trip is only limited by how many batteries that you can carry!