[Review] ACEBEAM Rider RX (Nichia 219F, AA/14500) || Output and Power Regulation Measurements

Here's my review for the ACEBEAM Rider RX.

The flashlight comes in a nice cardboard box.

The following accessories are included:
- USB Type-C charging cable.
- ACEBEAM branded 920mAh 14500 battery.
- Instruction manual.
- 4 x replacement o-rings
- Wrist lanyard.

The Rider RX comes in a few different colors and finishes.
I've went with this fabulous polished stainless steel finish that matches nicely with the anodised blue inner shell.

The body of the flashlight is smooth, with some cutouts to expose its inner shell.

As we can see the flashlight is actually consisted out of two "layers".
A thick polished stainless steel outer shell along with the blue anodised flashlight module.

A rear mechanical switch is used for controlling the power and the modes of the flashlight.

The switch is forward clickie, which means that momentary on is supported.

A subtle bezel is in place to protect the lens.

Looking at the head of the flashlight, we can see a smooth reflector along with a Nichia 219F 5000K 90CRI emitter, which produces a
very nice neutral light.

ACEBEAM has implemented an interesting design on the Rider RX.
Basically this pocket clip also acts the mechanism for allowing the user to retract the inner part of the flashlight in and out
so that the battery can be replaced.
Additionally, ACEBEAM advertises this mechanism as a go-to fidgeting device.

The actual pocket clip provides great retention.

Two torx screws along with a spacer keeps the pocket clip in place.

Once the pocket clip is extended forward, the user get access to the flashlight head.

As we can see, the head threads are copper, in order to allow for optimum heat transfer to the body.

The driver seems to be press fit and secured in place via two bent brass tabs.
The positive terminal of the light is making use of a brass button.

Looking down the shell's body, we can see a short copper spring.

And here's how the flashlight looks when stripped from its stainless steel outer shell.

An ACEBEAM 14500 920mAh cell is also included in the bundle.

The battery includes a Type-C charging interface and its indicator LED will shine as soon as it's plugged in.

User Interface

The Rider RX makes use of a very simple UI.
Here's all the supported actions:

Power on/off: Full press
Mode cycle: Half press (while off) / quickly power-off -> power-on while on. (Ultra Low > Low > Mid > High)
SOS: 10 consecutive mode switches.

Mode memory is on.
Low voltage protection is present implemented, but the cut-off happens straight away, without warning.


Here's my output measurements using the included 14500 cell along with the current draw per each output level.

High pushes more than 600 lumen and draws 3.1A.
As we can see, the manufacturer's output specifications match pretty tightly with what I measured during my tests.

Power Regulation

Here's a power regulation graph for the Rider RX running on 14500 cell.

What we can see in the graph:

  • High starts off at ~3.1A and its output gets linearly proportionate to the input Voltage once the 3.9V point is reached.
  • The rest of modes also seem to follow a linear relation to the input voltage.
  • Interestingly, some signs of true power regulation are show at <3.4 for medium and at 3.6V for Low.

Wall Beamshot

Here's a wall beamshot of the Rider RX using a fixed exposure and shutter speed. Colour balance is set at 5000K.

Bottom Line

I have to say that I've thoroughly enjoyed using the Rider RX and I've included it in my daily EDC rotation
Excellent build quality and a very pleasing tint along with more than enough output for a daily light.

Correction: The outer shell is stainless steel, not aluminum as I’ve originally stated.
I’ve edited the original text.