Convoy S21E vs Emisar D4K

102 facts in comparison

Based on 869 Reddit opinions. Close race—Emisar D4K edges ahead.

869 opinions
Emisar D4K leads by 2pts
CS
Convoy S21E
84%
B+
Based on
1,075 Redditors

Convoy S21E

393 opinions

tldr; Pocketable 21700 EDC with deep reflector. SFT40 balances throw/flood. Anduril version available from Simon.

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VS
Reddit's Pick
ED
Emisar D4K
86%
A-
Based on
1,605 Redditors
Winner

Emisar D4K

476 opinions

tldr; D4V2's bigger brother with 26800 battery. Hank's magic with better sustained output. X1 driver recommended.

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Brightness & ThrowEmitter & TintRuntime & BatteryBuild QualityUser Interface
☀️BRI
EMI
⏱️RUN
🔧BUI
USE
80
Points
80
Points

Score by Category

Brightness & Throw
67%82%
Emitter & Tint
83%78%
Runtime & Battery
90%89%
Build Quality
83%83%
User Interface
60%82%

Why is Emisar D4K better than Convoy S21E?

  • Higher Reddit score (86% vs 84%)
  • Better brightness (82% vs 67%)
  • Better ui (82% vs 60%)
  • 26800 for massive runtime
  • Same aux LED fun
Based on 2,680 Reddit opinions
Too Close to Call

Reddit prefers the Emisar D4K

Winning by 2 points (86% vs 84%)

Better brightness
Better ui
26800 for massive runtime
High confidence (2,680 mentions)

💬Reddit Sentiment

Based on 2,680 Reddit mentions

Overall Rating

Convoy S21E
8.4/10
1,075 mentions
Emisar D4K
8.6/10
1,605 mentions
BRIGHTNESS
Convoy S21E6.7/10
Emisar D4K8.2/10
EMITTER
Convoy S21E8.3/10
Emisar D4K7.8/10
BUILD QUALITY
Convoy S21E8.3/10
Emisar D4K8.3/10
UI
Convoy S21E6.0/10
Emisar D4K8.2/10
RUNTIME
Convoy S21E9.0/10
Emisar D4K8.9/10
VALUE
Convoy S21E9.8/10
Emisar D4K6.4/10
⚔️

Head to Head

Head to Head

Convoy S21E: 2|Emisar D4K: 2
BrightnessEmisar D4K
Convoy S21E67%
Emisar D4K82%
EmitterConvoy S21E
Convoy S21E83%
Emisar D4K78%
Build Quality
Convoy S21E83%
Emisar D4K83%
UiEmisar D4K
Convoy S21E60%
Emisar D4K82%
Runtime
Convoy S21E90%
Emisar D4K89%
ValueConvoy S21E
Convoy S21E98%
Emisar D4K64%
Convoy S21E84%
Emisar D4K86%
Close race - Emisar D4K edges ahead by 2 points

Key Specs

SpecConvoy S21EEmisar D4K
Material
Aluminum Alloy
Battery
1 x 21700 lithium battery
Head Diameter
27.3mm
Lens Type
AR-coated glass
Reflector
Orange Peel

Key Highlights

Convoy S21E
📦 Pocket-friendly 21700
🎯 Good throw for size
⚙️ Anduril optional
💰 Great value
Emisar D4KWinner
🔋 26800 for massive runtime
⚡ Better sustained turbo
🌈 Same aux LED fun
📦 Still pocketable

Topic Battles

Convoy S21E: 1|Tied: 2|Emisar D4K: 2
☀️Brightness & Throw
Emisar D4K wins
Convoy S21E
67%
Emisar D4K
82%
Emitter & Tint
Convoy S21E wins
Convoy S21E
83%
Emisar D4K
78%
⏱️Runtime & Battery
Convoy S21E
90%
Emisar D4K
89%
🔧Build Quality
Convoy S21E
83%
Emisar D4K
83%
User Interface
Emisar D4K wins
Convoy S21E
60%
Emisar D4K
82%

Based on Reddit sentiment across 5 categories

📈Where They Rank

💬What Redditors Actually Say

What Redditors Say

Best praise vs top criticism for Emisar D4K

Best Praise
+46 pts
Everyone needs an Emisar D4K 519a 5700K DD. ^(and a Lumintop Thor 3 for fucking about with)
r/flashlight
View
Top Criticism
+30 pts
It gets too hot, too fast for these Hank hotrods. I knew this going in but jeez, the copper head makes them even worse. 12 seconds is the max I can hold the D4K by the head. The D3AA steps down around the 20 sec mark which is around the time I start feeling the heat coming on. They’re definitely stylish and make a nice pair but that’s about it for me. There’s one thing I’ve noticed that annoys me more than the heat and that’s how unpleasant the threads are when unscrewing/screwing the tail cap. It even sounds bad . It’s as if the threads have a sand powder on them or something. Not a gritty sound or feel but a very dry experience if that makes sense. I guess that’s just how titanium threads are because my Convoy T4ti has the same attributes other than the heat issue. Ti looks nice but that’s about it as far as I’m concerned.
r/flashlight
View
3 more quotes available below

What Redditors Say

Best praise vs top criticism for Convoy S21E

Best Praise
+18 pts
If you're going into this and these are your first Convoy lights, then you really have a core grouping that I think you must go for: 1. S6/S8, with 3000K 95CRI SFT40, 8A buck driver 2. M21H, with the XHP70.3HI 4000K R70, and select every possible TIR to swap in so you can try them all 3. S21E, with the 3500K B35AM, and like the M21H, select every possible TIR to swap in These 3 should get you to about $100 roughly, and it's a good start for general use and in the case of the S6/S8, slightly floody-throwy options. All of them should sport a boost or buck driver for great runtimes, low heat and decent efficiency and sustained output.
r/flashlight
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Top Criticism
+15 pts
That sucks! I let some carpenters borrow an S21E once when they were working on my carport. Well they left before I knew it and the guy I let borrow the light never came back on the next couple days before they were finished. I asked the other guys that came back the next day and they acted like they had no idea what I was talking about.
r/flashlight
View
3 more quotes available below

📈Historical Price Data

Convoy S21E
$160$200$240Jun '25Jul '25Aug '25Sep '25Sep '25Dec '25Jan '26Mar '26Mar '26Low: $148.75Current: $249.99
Convoy S21E
All-time low: $148.75(2025-09)

Which is Better?

Emisar D4K Wins
86%
D4K
vs
84%
S21E

Close race, but Emisar D4K edges ahead by 2 points based on 2,680 Reddit opinions.

Why Emisar D4KWinner
  • 🔋 26800 for massive runtime
  • ⚡ Better sustained turbo
  • 🌈 Same aux LED fun
  • More discussed (1,605 vs 1,075)
Why Convoy S21E
  • Better Value for Money (98% vs 64%)

❤️The Love/Hate Breakdown

Sentiment Breakdown

26%Positive
Positive
26%
Neutral
70%
Negative
4%
Based on 1,605 Reddit opinions

Sentiment Breakdown

31%Positive
Positive
31%
Neutral
64%
Negative
5%
Based on 1,075 Reddit opinions

Frequently Asked Questions

Which is better, Emisar D4K or Convoy S21E?
Based on 2,680 Reddit comments, Emisar D4K has a slight edge with 86% positive sentiment vs Convoy S21E's 84%. The difference is small, so both are solid choices.
Should I buy Emisar D4K or Convoy S21E?
Both have similar approval ratings (86% vs 84%), so focus on specific features, pricing, and what matters most to you.
What do Redditors love about Emisar D4K?
Reddit users highlight: 26800 for massive runtime. Better sustained turbo. Same aux LED fun. With 1,605 mentions and 86% approval, it's a well-regarded choice in the community.
What do Redditors say about Convoy S21E?
Reddit users highlight: Pocket-friendly 21700. Good throw for size. Anduril optional. With 1,075 mentions and 84% approval, it remains a popular alternative.
How many Reddit reviews were analyzed?
This comparison analyzed 2,680 Reddit comments: 1,605 about Emisar D4K and 1,075 about Convoy S21E. Data was sourced from Flashlights community discussions.
How accurate are these ratings?
Our sentiment analysis is approximately 80-85% accurate compared to manual review. Well-discussed products with many mentions tend to have more reliable scores than niche items with fewer data points.
Why trust Reddit over professional reviews?
Reddit users bought products with their own money and have no incentive to mislead. You're seeing hundreds of real opinions across different use cases, not just one reviewer's take. This crowdsourced approach surfaces both common praise and recurring complaints.

869 Reddit opinions analyzed · Last updated 4/15/2026