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Panasonic Beard Hair Trimmer ER-SB40-K review

No. 5 of 10 in our beard trimmers ranking · Updated · How we rank

Our verdict: The Panasonic Beard Hair Trimmer ER-SB40-K ranks 5th of the 10 beard trimmers we compare, with 8.6 out of 10. It takes our Best Budget badge.

Panasonic Beard Hair Trimmer ER-SB40-K

8.6/10Best Budget

The Panasonic ER-SB40-K is a rechargeable stubble and short-beard trimmer with a dial-set comb and 19 lengths up to 10 mm. It suits men who keep a short beard and want a simple, fast trimmer.

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Why it's here

  • 19 length settings on one snap-on comb, from 0.5 mm to 10 mm
  • Linear motor cuts quickly through dense stubble
  • Up to 60 minutes of cordless use from a one-hour charge, or plug in
  • Washable head and a low price

Keep in mind

  • Stops at 10 mm, so it will not trim a long beard
  • No travel case or extra heads
  • Needs the snap-on comb for every length above the 0.5 mm bare-blade cut

Why the Panasonic ER-SB40-K scores 8.6

Each bar shows where it places among the 10 beard trimmers in this guide, so a full bar is 1st of 10. How happy owners are counts for most of the score.

  • How happy owners are5th of 10
  • How many rated it3rd of 10
  • How new it is7th of 10

Why it sits behind the Wahl Lithium Ion All-in-One Grooming Kit 9854-600

The Wahl Lithium Ion All-in-One Grooming Kit 9854-600 (8.7) edges the Panasonic Beard Hair Trimmer ER-SB40-K (8.6) on the balance of all three parts.

About the Panasonic ER-SB40-K

The ER-SB40-K is a single-purpose facial trimmer. A rotary dial on the comb sets the length across 19 positions, from 0.5 mm to 10 mm. With the comb off, the bare blade cuts to about 0.5 mm. There are no extra heads or separate guards to keep track of.

Power comes from a linear motor, which Panasonic and reviewers describe as holding steady speed as the battery drains. The blade is wide and angled, which suits dense, curly or flat-lying hair. One hour on the charger gives about one hour of cordless use, and it also runs plugged in. The head detaches and rinses under running water.

The body is about 9.6 inches tall and 2.6 inches wide, with a rubberized grip. A lock stops it switching on in a bag. It charges through a proprietary connector, not USB.

What owners report about the Panasonic ER-SB40-K

Owners with thick or coarse facial hair report that it cuts through it easily. Many like the single adjustable comb, since it replaces a set of loose guards. The rubberized grip gets praise, and the build feels solid to them. Some say they prefer it to the Wahl trimmers they used before.

Complaints are fewer. It is loud, and some owners find the sound sharp near the ears. It cannot show battery level without being switched on. A few find it heavier than older trimmers. One owner found the blade position awkward for edging, and said replacement blades were hard to find and costly to ship.

Owners say the battery holds its charge well, and that plugging in is a fallback if it ever weakens. Most feedback we found is from the first months of use, so long-term wear is not well covered.

Who the Panasonic ER-SB40-K suits

This trimmer suits anyone who keeps stubble or a short beard and wants one comb with a dial. It also suits men with dense hair who found weaker trimmers bog down. The washable head keeps cleanup quick.

Look elsewhere if you grow a long beard, since it stops at 10 mm. For one trimmer that also does head and body, the Philips Norelco All-in-One 7000 Series 23-Piece Trimmer MG7970/49 is a better fit. If you travel, note there is no case and no USB charging.

Questions about the Panasonic ER-SB40-K

How long does the Panasonic ER-SB40-K battery last?

About one hour of cordless use from a one-hour charge. It also runs while plugged in.

How many length settings does the Panasonic ER-SB40-K have?

19. A dial on the comb sets them from 0.5 mm to 10 mm, and the bare blade without the comb cuts to about 0.5 mm.

Is the Panasonic ER-SB40-K waterproof?

It is washable. Detach the head and rinse it under running water.

Where can I get a replacement blade for the Panasonic ER-SB40-K?

Owners report that replacement blades are hard to find and can be costly to ship, so check availability before you need one.

Does the Panasonic ER-SB40-K come with a travel case?

No. It has no case and no extra heads, and it charges through a proprietary connector, not USB.

Other beard trimmer picks

The other badge winners in our beard trimmers ranking.

All 10 beard trimmers, compared

  1. 1 Philips Norelco Multigroom Series 5000 MG5910/49Best Choice 9.1 Check Price
  2. 2 Philips Norelco All-in-One 7000 Series 23-Piece Trimmer MG7970/49 8.9 Check Price
  3. 3 Philips Norelco Beard Trimmer 9000 Prestige BT9810/40Best Premium 8.8 Check Price
  4. 4 Wahl Lithium Ion All-in-One Grooming Kit 9854-600Value for Money 8.7 Check Price
  5. 5 Panasonic Beard Hair Trimmer ER-SB40-KThis reviewBest Budget 8.6 Check Price
  6. 6 Braun All-in-One Series 5 Trimmer AIO5510 8.6 Check Price
  7. 7 Panasonic Multi-Groomer ER-GB80-S 8.6 Check Price
  8. 8 Wahl Lithium Ion+ Stainless Steel Grooming Kit 09818-5001 8.6 Check Price
  9. 9 Manscaped The Beard Hedger 8.5 Check Price
  10. 10 Remington The Beardsman Beard Boss Full Beard Grooming Kit MB4045B 8.4 Check Price
See the full beard trimmers ranking

The Panasonic ER-SB40-K on Amazon

Panasonic Beard Hair Trimmer ER-SB40-K

The Panasonic ER-SB40-K is a rechargeable stubble and short-beard trimmer with a dial-set comb and 19 lengths up to 10 mm. 8.6 out of 10.

Check Price on Amazon

How we score it

Every score here comes from our ranking model; no editor sets the order. We haven't read the review sites for this guide yet, so for now it is led by owners. It ranks products by how happy owners are, holding back any product few owners have rated until more agree. How many rated it and how new it is only settle close calls, and value for money earns its own badge rather than a higher place. We compared 23 models for this guide before settling on these ten.

Brands can't pay to be included or to move up. We last checked these picks in November 2026.

How we rank, in full

Where these facts come from