The flashlight was sent to me by SPERAS for review.
Here's the product's link: SPERAS EST
The SPERAS EST comes in a nice cardboard box.
Here's a closer look at the light's specifications.
The following accessories are included in the package:
- SPERAS branded 18650 cell
- Adjustable wrist lanyard
- 2 x replacement o-rings
- Type-C charging cable
- User manual
The flashlight comes with a very nice, chalky feeling anodization, which given it a matte finish.
The body of the light contains a lot of heavy texturing / grooving to improve the grip.
The SPERAS EST is dual switch operated.
In the middle of the head we get an electronic switch.
The switch is backlit to inform the user about the battery's level during normal operation or charging.
Opposite to the e-switch we see the charging interface of the light.
The interface uses a regular USB Type-C port which is sealed via a rubber flap.
In the rear of the light, we find a mechanical, forward-clickie switch which is used to power it on/off.
The switch boot sits below the two metal flaps and thus the light can tailstand.
In the front of the EST we can see a crenelated bezel.
The head houses a TIR lens along with a Luminus SST40 emitter.
The centering of the emitter is perfect.
The driver sits in the rear of the head and seems to be glued into place.
A short, stiff spring is used as the positive terminal.
The tail assembly can be easily taken apart, since it's secured via a retainer ring.
Here's the tail taken apart.
And a closer look at the mechanical switch.
Both the front and rear threads are very cleanly cut and are anodized.
The anodization allows the flashlight to be mechanically locked out.
A detachable pocket clip also comes with the light.
The clip is quite stiff and provides great retention.
The manufacturer also includes a SPERAS branded 18650 cell with 3100mAh of capacity.
The cell is button top and is protected.
User interface
The SPERAS EST comes with a straightforward user interface.
Here's all the supported actions by the flashlight's firmware:
Turn on/off: Single press (rear switch)
Momentary on: Half press and hold (rear switch)
Momentary strobe: Double half press and hold (rear switch)
Mode cycle: Single press (e-switch) (Low > Medium > High > Turbo > Low > ...)
Strobe: Double half-press and click (rear switch) or Double press (e-switch)
SOS: Double press (e-switch) while on Strobe
Mode memory is present.
Low voltage warning and protection are also in place.
Output
Here's my output measurements recorded using the included SPERAS 18650 cell.
As we can see, the EST pushes 1790 at startup while drawing 4.90A
The manufacturer's outputs specifications seem pretty accurate.
Power Regulation
Here's a power regulation graph I've created using a bench power supply.
Please note that, especially for Turbo, the current we'd record using a regular 18650 cell would be lower due to the voltage drop under heavy current draw.
As we can see, the output of every mode is directly dependant on the input voltage.
Seeing a fully regulated driver would be a nice addition.