Review of Aurora AK-P7-3 SSC P7-C 900-Lumen 2-Mode LED Flashlight from Deal Extreme sku.14451 $50.02
Construction: Machined from one piece of aluminium, with short extension tube and not so short tailend.
First thoughts - Seems to be well engineered and thought out. Pill and soldering look ok. Longer (236 mm)than some other 2 x 18650 torches, probably due to the resistive tailcap, light output seems good.
Runtime = 2 hrs 16 mins (continuous)
Current draw from battery = 1.16A (measured) Voltage unmeasured
Voltage at P7 = 3.34V (measured)
Current at P7 = 1.42A (calculated)
Estimated Watts @ LED 4.7W
Lumens = 400 ?
Runtime = 5 hrs 43 mins (continuous)
Current draw from battery = 0.6A (measured) Voltage unmeasured
Voltage at P7 = 2.99V (measured)
Current at P7 = 480mA (calculated)
Estimated Watts @ LED 1.4W
Lumens = 140 (estimated)
Resistor in tailcap = 7.5 ohms (measured)
Battery recharge time 7 hrs 50 mins
Weight inc. batteries 374 g (13.2 oz)
Maybe not the best P7 torch out, but imo it's well suited to use as a cycle light as it doesn't have lots of silly modes, high isn't a 'turbo' mode that can only be used for a few minutes and it won't switch to SOS and flash modes on bumpy roads.
Other thoughts - there are reports of the board and resistor failing when running on 4 x CR123A cells. Although the manufacturer recommends a maximum volage of 17V so the torch should cope with 4 CR123A's. However, if the removable extension tube is removed the torch can (in theory) be used with 3 x CR125A cells (I say in theory as I don't have 3 x CR123A cells to try it).
Oh yeah, light output isn't bad and I would (and probably will) buy another.
Good build quality
High for out of town
Low for in town
Doesn't have 5, 8 or 30 useless modes so better suited to cycling
Might be a bit long for some people 236 mm (9 1/4")
Doesn't have SOS for when you are lost on the moors
I've bought the following mounts to try:
sku.15342 Universal Bicycle Mount (22mm~32.8mm) Price: $3.98
sku.792 Flashlight Mount Price: $1.99
sku.13004 Fenix Flashlight Bike Mount Price: $8.40
sku.15642 Universal Bicycle Mount for Flashlights and Gadgets Price: $3.35
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