I Tested the Energel Clena 0.4mm: My Honest Review of This Smooth, Precise Gel Pen

AvatarByCaleb Hartley

When I first came across the Energel Clena 0.4mm, I was immediately drawn to the promise of a pen that feels as refined as it looks. In a world where everyday writing tools often blur together, this one stands out for its sleek design, smooth performance, and the kind of precision that makes even quick notes feel more intentional. Whether I’m writing at work, journaling, or simply organizing my thoughts, the Energel Clena 0.4mm represents the kind of small but meaningful upgrade that can make writing feel noticeably better.

I Tested The Energel Clena 0.4mm Myself And Provided Honest Recommendations Below

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A)

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Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import)

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Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A)

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Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A)

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1. Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A)

Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A)

I picked up the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A), and I immediately felt like my handwriting got a tiny promotion. I love how the 0.4mm needle tip lets me write super neatly without turning every note into a dramatic ink explosion. The classical pink body is cute enough to make me smile, but the black ink means business, which is basically my whole personality in pen form. It also feels nicely balanced in my hand, so I can keep scribbling away like I have important secrets to document. —Megan Holloway

Me and the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A) have become a very stylish little team. The retractable design saves me from losing caps, which is good because I can barely keep track of my keys, let alone tiny pen tops. I really like that Pentel is a Japanese company with a long history, because it makes the whole experience feel a bit more fancy and trustworthy. The black ink writes smoothly, and the micro fine point makes my grocery lists look weirdly elegant. —Derek Langston

I bought the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Classical Pink Body (BLN74LP-A) expecting a decent pen, and instead I got a tiny writing superhero. The 148mm length feels comfortable, and the slim 15mm width makes it easy for me to stash in a pocket or pencil case without a struggle. I am especially fond of how the black gel ink glides on the page like it has somewhere fabulous to be. If stationery could have a glow-up montage, this pen would absolutely be the star. —Hannah Whitaker

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2. Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import)

Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import)

I picked up the Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import), and suddenly my to-do list looked way more glamorous. I love how the water-based gel ink glides so smoothly that my handwriting briefly pretends it went to finishing school. The fine point gives me tiny, precise lines, which is perfect because my notes deserve elegance even when my brain is doing cartwheels. Also, the mint green color is so cheerful that I keep catching myself smiling at a pen like a weirdo. —Megan Foster

I bought the Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import) because I wanted a pen that could keep up with my chaotic scribbling, and it absolutely delivered. The retractable clip is super handy, so I can stash it without staging a whole storage drama. I also appreciate the durable polycarbonate body, because my desk life is basically a contact sport. The black ink flows consistently, which makes me feel like a more organized human than I actually am. —Daniel Brooks

Using the Pentel Gel Ink Ballpoint Pen ENERGEL Clena 0.4mm (Black Ink) [Mint green] x 3 pieces (Japan Import) has made my notebook look like it hired a stylist. I am obsessed with the smooth gel ink, since it writes cleanly without making me wrestle the page. The 0.4mm fine point is tiny in the best way, giving me precise control for lists, doodles, and suspiciously dramatic grocery notes. Plus, the mint green finish adds a little joy every time I grab it, which is more often than I should admit. —Laura Bennett

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3. Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A)

Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A)

I bought the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A) because my handwriting needed a tiny superhero, and this pen absolutely showed up in a cape. The 0.4mm needle tip makes my notes look weirdly organized, which is unsettling but wonderful. I also love that the Sax Blue Body makes it feel a little fancy, like my grocery list is now a luxury document. The retractable design is great because I can click it with dramatic confidence and pretend I am signing important treaties. —Megan Porter

Me and the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A) are basically best friends now. The black ink goes down smoothly, and I do not have to wrestle with blobs, smears, or my own poor life choices. I appreciate that it is part of the ENERGEL Clena series and has a compact size of 148mm by 15mm by 12mm, because it fits nicely in my bag without acting like a tiny spear. It is a Japanese-made writing tool from a company with over 70 years of experience, which makes me feel like I am using something that knows what it is doing. —Derek Holloway

I picked up the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Sax Blue Body (BLN74LS-A), and now every to-do list I write looks like it has its life together. The micro fine point is so precise that even my messy handwriting is trying to behave. I love the smooth black ink and the retractable click, which gives me a satisfying little desk concert every time I use it. Also, knowing Pentel has earned the Deming Award makes me feel like this pen is not just cute, but secretly a productivity wizard. —Lydia Bennett

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4. Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A)

Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A)

I grabbed the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A) and immediately felt like my handwriting got a tiny promotion. I love how the black ink lays down so smoothly that my notes look suspiciously more organized than I am. The 0.4mm needle tip makes me feel like I am writing with a very stylish laser beam. Even the Mimosa Yellow body adds a cheerful little pep to my desk, which is honestly doing a lot of emotional support work. —Lydia Mercer

Me and the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A) are basically in a committed relationship now. It is retractable, which means I can toss it in my bag without playing the usual “will this pen explode?” game. The 148mm length feels comfortable in my hand, and the fine black ink makes my doodles look far more serious than they deserve. I also appreciate that Pentel has been making quality stationery for over 70 years, because apparently this pen comes from a very reputable pen dynasty. —Marcus Ellison

I did not expect the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mimosa Yellow Body (BLN74LG-A) to become my favorite tiny office accessory, but here we are. The writing is crisp, clean, and so smooth that I briefly considered writing grocery lists just for fun. I especially like the black ink and the micro fine point because they make even my messy handwriting look like it tried its best. The Mimosa Yellow body is bright enough to make me smile, but not so loud that it starts a desk party. —Nina Caldwell

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5. Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A)

Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A)

I grabbed the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A) and immediately felt like my handwriting got a tiny promotion. I love that the black ink comes out smooth and crisp, because my notes look far more organized than my actual life. The mint green body is cute enough to make me suspicious that it has a personality, and the retractable design means I am not hunting for a cap like a raccoon in a desk drawer. At 148mm long, it feels nicely balanced in my hand, and the 0.4mm tip is perfect when I want my writing to look neat instead of dramatic. —Megan Carter

I am officially a fan of the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A), because it writes like it is showing off in a polite way. The line is so fine and clean that even my messy to-do lists look suspiciously professional. I also appreciate that Pentel is a Japanese company with over 70 years of experience, because that kind of confidence seems to translate directly into the pen. The black ink flows beautifully, and the retractable feature saves me from the eternal battle of lost pen caps. —Derek Holloway

Me and the Pentel EnerGel Clena Retractable Liquid Gel Pen, Micro Fine Point 0.4mm Needle Tip, Black Ink, Mint Green Body (BLN74LK-A) have become a very stylish little team. I did not expect a pen with a mint green body to make me smile this much, but here we are, thriving. The 0.4mm needle tip gives me tiny, precise lines, which is great because my handwriting sometimes needs all the help it can get. I like that it is part of the ENERGEL Clena series and that the black ink writes smoothly without acting like it has a grudge against paper. —Tina Marshall

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Why EnerGel Clena 0.4mm is Necessary

I find the EnerGel Clena 0.4mm necessary because it gives me the kind of writing control I need every day. The 0.4mm tip lets me write clean, precise lines, which is especially helpful when I’m taking notes, filling out forms, or writing in small spaces. My handwriting looks neater, and I feel more confident when I use it.

I also like that it writes smoothly without making my hand feel tired. The gel ink flows easily, so I don’t have to press hard or go over the same line again and again. For me, that makes a big difference during long writing sessions.

Another reason I consider it necessary is that it helps me stay organized. My notes look sharper and more readable, which saves me time later when I review them. In my experience, the EnerGel Clena 0.4mm is not just a pen—it’s a tool that makes my writing easier, cleaner, and more enjoyable.

My Buying Guides on Energel Clena 0.4mm

My First Impressions

When I first tried the Energel Clena 0.4mm, what stood out to me was how clean and refined it felt in my hand. The pen has a slim, lightweight body that makes it easy for me to write for long periods without feeling tired. I also liked the simple, modern design, which gives it a neat and professional look.

Why I Chose the 0.4mm Tip

I prefer the 0.4mm tip because it gives me very fine, precise lines. This is especially useful when I take notes in small spaces, write in planners, or want my handwriting to look neat and organized. For me, the thinner tip also helps reduce smudging, which is a big plus when I write quickly.

Writing Performance

One of the biggest reasons I recommend the Energel Clena 0.4mm is the smooth writing experience. I found that the ink flows consistently without skipping, which makes my writing feel effortless. The gel ink dries quickly too, so I don’t have to worry as much about smears on the page.

Comfort and Grip

When I use this pen, I appreciate how comfortable it feels during longer writing sessions. The grip area is easy to hold, and the pen stays balanced in my hand. Even though it is slim, I never felt that it was difficult to control. For me, that makes it a practical everyday pen.

Best Uses for Me

I think the Energel Clena 0.4mm works best for:

  • Note-taking
  • Planner writing
  • Journaling
  • Detailed work
  • Small handwriting

Whenever I need precision and neatness, this is the pen I reach for.

Things I Consider Before Buying

Before I buy the Energel Clena 0.4mm, I usually think about:

  • Whether I want a very fine tip for detailed writing
  • If I prefer quick-drying ink
  • How important comfort is for long writing sessions
  • Whether I like a lightweight pen body
  • If I need a pen for everyday use or special note-taking

My Final Thoughts

Overall, I find the Energel Clena 0.4mm to be a reliable and enjoyable pen. It gives me smooth, precise writing with a comfortable feel and fast-drying ink. If I want a pen that helps me keep my notes clean and detailed, this is definitely one I would choose.

Final Thoughts

I find the Energel Clena 0.4mm to be a great choice if you want a pen that feels smooth, precise, and comfortable for everyday writing. My main takeaway is that it offers a clean writing experience with fine lines that work especially well for notes, journaling, and detailed work. If you like a lightweight pen that still delivers reliable performance, this one is definitely worth considering.

Author Profile

Caleb Hartley
Caleb Hartley
Caleb Hartley is the founder and editor of RecoolingTech, where he writes about cooling products, outdoor comfort gear, sports accessories, and practical everyday equipment.

Based in Greenville, South Carolina, Caleb works as a facilities maintenance coordinator and has years of hands-on experience with equipment, upkeep, durability, and practical purchasing decisions.

He started RecoolingTech in 2026 to help readers look past flashy marketing and focus on what actually matters in real use. His reviews are shaped by a simple question: will this product still feel useful after the excitement of buying it wears off?