Acebeam E70 Mini High-CRI EDC Torch

Specifications

Brand/model Acebeam E70 Mini High-CRI EDC Torch
LED 3*Nichia 519A 5000K
Maximum lumens 2,000 lm
Maximum beam intensity 5,875 cd
Maximum throw 153 m
Battery 1*18650 Li-ion
Onboard charging No. Acebeam 18650 Li-ion cell has USB-C charging.
Material Aluminium
Modes 6
Blinkies Strobe
Reflector TIR
Review date July 2022

Introduction

Acebeam have released the E70 Mini with three Nichia 519A emitters! It is the smaller high CRI version of the E70 with arguably nicer emitters.

If you have heard of Nichia 219B emitters, due to their popularity for being rosy, then you may have noticed that the torch enthusiast community has become super excited about the Nichia 519A emitters.

A 519A emitter is fairly neutral with the dome left on. To make the beam rosy and to reduce the Correlated Colour Temperature (CCT), you could remove the domes of the emitters (warning: this may void the warranty). Acebeam have left the domes on.

After receiving an Acebeam Rider RX from a giveaway, I bought a few for family and friends due to the excellent build quality and ease of use. While chatting with Acebeam, they asked if I would like to review the Acebeam E70 Mini. This torch was provided by Acebeam for review for free. I have not been paid for this review nor have I held back my opinions.

Packaging

The E70 Mini came in a small white retail box with a window. The box came inside a slightly larger box with bubble wrap. It was very well packed.

Acebeam E70 Mini packaging front Acebeam E70 Mini packaging left Acebeam E70 Mini packaging back Acebeam E70 Mini packaging right

The following was included in the box:

  • Acebeam E70 Mini
  • Acebeam 18650 3100mAh Li-ion cell (optional)
  • Lanyard
  • Spare o-rings
  • USB-A to USB-C cable
  • User manual

Acebeam E70 Mini packaging tray Acebeam E70 Mini accessories

Acebeam E70 Mini manual

Torch in use

The E70 Mini looks like a tactical torch with a matte black finish but it is comfortable, there are no sharp edges, and the beam that it produces is easy on the eyes.

Acebeam E70 Mini in hand

A slightly recessed electronic tail-switch with an aluminium switch cover has been used and the lanyard holes are on the side of the tube. This allows the E70 Mini to tailstand.

Acebeam E70 Mini button

There is an inner tube and an outer tube to allow the signal from the electronic tailswitch to reach the driver in the head of the torch.

Acebeam E70 Mini tubes Acebeam E70 Mini spring

The stainless steel pocket clip is held in place with two screws. It is fairly rigid but there is sufficient flexibility to allow it to clip onto my pocket.

There is no magnet in the tail. This is not unusual for a torch with a tailswitch.

Build quality

The anodising looks perfect. I like the matte black finish. This aluminium version of the E70 Mini is lightweight.

The bezel, head, button, outer tube and inner tube are made of aluminium while the pocket clip is made of stainless steel.

Square cut threads on the tube came well lubricated. It is easy to screw on the head of the torch.

The included Acebeam 18650 cell with built-in USB-C charging sits flush with the top of the tube when the head is removed. The cell can be pressed down further due to the spring at the tail end. The cell does not wobble around when the torch is being shaken. However, it would be nice if slightly longer spring with less tension are used so that a common flat top 18650 cell could be used.

Acebeam E70 Mini protective

The CNC’d aluminium switch cover looks and feels nice. It has an audible click that you would expect from an e-switch.

The twelve 7.1mm by 1.7mm slots near the head of the torch for tritium vials is a nice touch for those who like to decorate their torches.

Acebeam E70 Mini front Acebeam E70 Mini left

Acebeam E70 Mini back Acebeam E70 Mini right

LED, bezel, lens and beam

The E70 Mini has three Nichia 519A emitters behind a TIR optic and an anti-reflective coated glass lens. Although the bezel looks sharp, it is smooth.

Acebeam E70 Mini optic

I have taken Correlated Colour Temperature (CCT) and Colour Rendering Index (CRI, RA of R1-R8) measurements with the E70 Mini positioned one metre away from an Opple Light Master Pro III (G3).

The CCT is about 4700K and it is 90+ CRI.

The Delta u, v is very close to zero and a little bit negative (rosy).

The beam produced is neutral and floody.

Mode CCT (K) CRI (Ra) x y Duv
Ultra-Low 4692 97.9 0.3544 0.3582 -0.0003
Low 4696 98.4 0.3545 0.3597 0.0004
Mid1 4696 98.1 0.3543 0.3588 0.0000
Mid2 4723 97.9 0.3535 0.3584 0.0001
High 4802 97.4 0.3508 0.3546 -0.0007
Turbo 4849 96.7 0.3488 0.3474 -0.0036

Calculate Duv from CIE 1931 xy coordinates

Dimensions and size comparison

Dimensions

I took the following measurements using digital callipers.

Measurement Unit (mm)
Torch length 111.5
Head diameter 26.0
Tube diameter 23.4

Weight

I took the following measurements using a digital scale.

Measurement Unit (g)
Weight of torch with battery 124.8
Weight of torch 72.4
Weight of battery 52.8

EDC size comparison with its competition

From left to right: Emisar D4V2, Acebeam E70 Mini, Convoy S2+.

Emisar D4V2, Acebeam E70 Mini, Convoy S2+

From left to right: Emisar D4V2, Acebeam E70 Mini, Convoy S2+.

Emisar D4V2, Acebeam E70 Mini, Convoy S2+

User interface and driver

Double click for On is a bit odd but it was deliberately designed like this to help prevent accidental activation.

State Action Result
Off Double click On (mode memory except Ultra-Low and Turbo)
Off Hold for 0.5s Ultra-Low
Off Hold for 5s Activate lock-out
Off Triple click Strobe
On Triple click Strobe
On Click Off
On Hold Cycle (Low, Mid1, Mid2, High)
Ultra-Low Click Off
Ultra-Low Hold Cycle (Low, Mid1, Mid2, High)
Ultra-Low Double Click Turbo
Ultra-Low Triple Click Strobe
Turbo Click Off
Turbo Hold Cycle (Low, Mid1, Mid2, High)
Turbo Double click Return to mode memory
Strobe Click Off
Strobe Hold Cycle (Low, Mid1, Mid2, High)
Strobe Double Click Turbo
Lock-out Hold for 3s Deactivate lock-out and enter Ultra-Low

Low voltage protection

The E70 Mini will step down when the battery is less than 20%. It will turn off when the battery is less than 2.7V.

PWM

I did not notice any visible PWM.

What I like about the UI

  • Simple user interface.

What could be improved

  • A single click for on instead of a double click would be nice but that is just my personal preference.

Batteries and charging

Battery

The E70 Mini takes an 18650 Li-on cell. Protected and unprotected button top 18650 cells fit. Unprotected flat top 18650 cells are too short and do not fit (e.g. Sony VTC6, Samsung 30Q).

A button top Acebeam 18650 3100mAh cell with built-in USB-C charging was included inside the E70 Mini. The cell arrived with a voltage of 3.58V, and it was isolated with a piece of plastic to avoid parasitic drain.

A capacity of 2957mAh was measured using Capacity Test mode at 500mA with a Vapcell S4 Plus.

Acebeam E70 Mini 18650 3100mAh Acebeam E70 Mini 18650 3100mAh USB-C

Charging profile

Power source: Generic 5V 2.4A Power Supply
Room temperature: 13 C
USB Meter: Ruideng UM25C

I used a Ruideng UM25C USB Meter to monitor the charging current while charging the included Acebeam 18650 3100mAh cell with built-in USB-C charging.

The charging current started at 120mA when the cell was 2.77V, increased to 750mA after a minute, and slowly reduced as the voltage reached 4.15V. The cell stopped charging at 4.15V and the LED went from red to green.

Acebeam 18650 Charging profile

The LED indicator of the cell changed to blue when I attached a USB-C to USB-C between it and a case for charging wireless earphones. The 18650 cell might share the same circuitry as the larger 21700 cell where Acebeam have an EDC bulb accessory that clips into the USB-C port. The output was not sufficient to charge my phone.

Power supply compatibility

I tried to charge the Acebeam 18650 3100mAh cell using the following power supplies:

Power supply USB Type Protocol Does it charge?
Apple 61W Power Adapter USB-C PD Yes
Google Pixel Power Adapter USB-C PD Yes
Generic 5V 2.4A Power Adapter USB-A Yes

Performance

Official specifications from the manual:

Li-ion Battery (Acebeam 18650 3100mAh)

FL1 Standard Turbo High Mid2 Mid1 Low Ultra-Low Strobe
Light Output 2000-600lm 900-600lm 380lm 170lm 60lm 20lm 1000lm
Runtime 40s + 2h 2min + 1h 55min 3h 15min 7h 19h 56h 2h
Throw 153m 102m 71m 52m 39m 20m 112m
Intensity 5,875cd 2,625cd 1,275cd 675cd 375cd 104cd 3,150cd

Lux Meter: UNI-T UT383BT

Lumen measurements

Mode Specs Lumens @turn on Lumens @30 sec Lumens @10 min
Ultra-Low 20 lm 11 lm 11 lm 11 lm
Low 60 lm 69 lm 68 lm 68 lm
Mid1 170 lm 184 lm 181 lm 179 lm
Mid2 380 lm 392 lm 383 lm 371 lm
High 900 lm 845 lm 816 lm 564 lm
Turbo 2000 lm 1648 lm 1532 lm 157 lm

Note: I usually measure the current at “turn on” for each mode but I skipped this step after trying and failing to remove the tailcap with circlip pliers. I managed to measure the parasitic drain by holding a cell against the driver and by touching a probe to the pad for the outer tube.

Parasitic drain

71.8 µA.

Runtime graphs

I built a lumen tube and forked bmengineer’s project RuTiTe to add support for a VEML7700 light sensor and MCP9808 temperature sensor with help from Owen. Calibration lights from maukka were used.

Note: Lumen measurements may be off by more than 10% with my DIY lumen tube. Temperature may vary due to the room temperature and it may be lower than expected due to how I attached the sensor.
Acebeam E70 Mini runtime graph

Acebeam E70 Mini first 10 minutes runtime graph

Acebeam E70 Mini turbo runtime graph

Acebeam E70 Mini high runtime graph

Acebeam E70 Mini mid2 runtime graph

Acebeam E70 Mini mid1 runtime graph

Acebeam E70 Mini low runtime graph

I like how Acebeam have included a breakdown of when the light output steps down in the manual instead of simply saying that Turbo will last two hours. For example: Acebeam stated that Turbo will start at 2000 lumens and last 40 seconds before stepping down to 600 lumens for two hours.

The E70 Mini switched off when the Acebeam 18650 3100mAh Li-ion cell reached 2.77V at the end of each runtime test. I charged the cell to 4.20V in an external charger before each runtime test.

Turbo was a little lower than expected with 1648 lumens at turn on (instead of 2000 lumens).

The light output and runtime for Turbo, High, Mid2, Mid1 and Low that I observed were similar the Acebeam’s official specifications.

I only tested Ultra-Low for 10 minutes because the expected runtime is 56 hours.

Throw

I took lux measurements with a UT383BT at 30 seconds for each mode. Ultra-Low was measured at two metres. Low, Mid1, Mid2, High and Turbo were measured at five metres.

Mode Specs (cd) Specs (m) Candela measured (cd) Distance (m)
Ultra-Low 104 20 12 6
Low 375 39 100 20
Mid1 675 52 375 38
Mid2 1,275 71 900 60
High 2,625 102 2,225 94
Turbo 5,875 153 5,200 144

Beamshots

5000K WB, 1/3 shutter speed, ISO 100

Ultra-Low
Acebeam E70 Mini Ultra-Low beamshot

Low
Acebeam E70 Mini Low beamshot

Mid1
Acebeam E70 Mini Mid1 beamshot

Mid2
Acebeam E70 Mini Mid2 beamshot

High
Acebeam E70 Mini High beamshot

Turbo
Acebeam E70 Mini Turbo beamshot

Conclusion

The Acebeam E70 Mini produces one of the most neutral beams that I have seen. It is a lovely tactical EDC torch!

I am impressed again with the build quality from Acebeam.

Pros:

  • High-CRI.
  • Neutral tint.
  • Excellent build quality.

Cons:

  • Unprotected flat top 18650 cells do not fit.

Product page

Product page