Panasonic ER-GB42 vs. ER-GB80: Which Beard Trimmer Fits You?

Reviewed: November 10, 2026

The Panasonic ER-GB42 is a good fit if you want to keep a short beard neat without collecting attachments. One adjustable comb handles the main trim, and the dial lets you make small changes to your length. We’d choose the ER-GB80 when you want to leave more fullness through your chin, refine your moustache with a smaller blade, or have a corded backup when the battery runs low.

The difference is less about which trimmer has more settings than about how much flexibility you need. For a beard you wear at the same short length week after week, the ER-GB42 keeps things simple. The ER-GB80 gives you more freedom to change your style, along with a much shorter wait between charges. Here’s how those differences translate to your morning trim.

Length control: one comb or room for a fuller beard?

The ER-GB42 gives you 19 guarded settings from 1 to 10mm, spaced half a millimeter apart. Instead of keeping several fixed-length guards beside the sink, you leave its comb attached and turn the dial. That is a convenient arrangement when you want to shorten your cheeks slightly while leaving a little more coverage around your chin.

A dial also makes small adjustments less of a commitment. Moving from 5mm to 4.5mm takes off less than jumping between widely spaced guards, which helps when you’re refining a familiar shape. The measurements are guides rather than promises of an exact finished length: the way your hair grows and how the comb rests against your face still matter.

The ER-GB80 uses the same half-millimeter spacing in its shorter range. Its extra reach comes from a second comb covering 11–20mm, alongside the 1–10mm attachment. If you like a fuller chin with shorter sides, that longer comb gives you a way to maintain the contrast without trimming everything back to the ER-GB42’s maximum length.

You do need to swap combs to move between those ranges, and there is no 10.5mm setting. That’s a small interruption if you regularly work at two different lengths. For an even 3mm beard, though, the ER-GB80’s advertised 39 settings don’t bring finer adjustment where you’re actually using it. The longer attachment earns its place when you want to keep more beard.

Handling and the finish around your moustache

Both models pair a rubberized grip with stainless-steel blades honed to a 45-degree edge. The textured handle gives your fingers purchase as you move around your jaw, while the comb helps lift flattened hairs toward the cutting blade. On the ER-GB42, that straightforward combination is the heart of the design: set a length, maintain the main shape, then remove the comb for the outline.

The ER-GB80 adds a slide-up precision trimmer. Its narrower cutting surface is useful near the ends of your moustache and in small areas where the main blade leaves less room to work. If you spend as much attention on the outline as on the overall length, having that second blade on the handle is a worthwhile convenience.

Neither main blade shaves completely smooth. Without a comb, each leaves approximately 0.5mm, so you may still want a separate razor for a bare neckline. For a close shadow with more adjustment at the very shortest lengths, our stubble trimmer guide offers a more useful starting point than either model’s longer comb settings.

A shorter recharge makes the ER-GB80 easier to keep ready

Cordless running time is similar: both offer about 50 minutes from a full charge, with actual time varying by use. Recharging is where the two models feel very different to own. The ER-GB80 takes about an hour, while the ER-GB42’s US adapter takes approximately 15 hours at 120V.

The ER-GB42 therefore suits a routine where charging happens well ahead of your next trim. You can leave it to charge when you won’t need it, then put it away ready for use. Its charger is for replenishing the battery; the handle doesn’t operate from the wall while you trim. Forget to charge it, and a quick plug-in before leaving home won’t replace that long recharge.

The charging lights differ, too. On the ER-GB42, the indicator stays lit until you unplug the charger, so it doesn’t tell you when the battery is full. The ER-GB80’s charge-status light goes out when charging is complete. It’s a modest convenience, but it makes readiness easier to judge when you’re charging between other things rather than leaving the trimmer plugged in overnight.

The ER-GB80 gives you a practical fallback because it supports corded operation as well as cordless use. Connect the adapter and you can continue grooming at a dry mirror rather than waiting for a full charge. A deeply depleted battery may still need at least a minute of charging before the blades run properly. That small qualification aside, the option is helpful on mornings when you have little time to spare.

What wet/dry use means for your beard trim

The ER-GB42 can be used in the shower, but its wet-trimming option is for use without the comb. If you’re maintaining a set beard length with the attachment, trim dry hair without shaving cream. That keeps the wet/dry feature in perspective: it offers another way to use the bare blade, rather than turning every guarded trim into a shower job.

The ER-GB80 is washable for cleaning, but use it for dry beard trimming and keep it out of the bath or shower. Disconnect its adapter before rinsing. If you usually groom in front of the mirror anyway, this is easy to accommodate; the faster recharge and corded option are likely to make a bigger difference to your routine.

It also includes a separate body-hair attachment that trims to approximately 1.5mm. That broadens the kit’s purpose if you want one handle for more than your beard. It doesn’t change the beard-length adjustment or replace the precision blade, so think of it as an additional use rather than the main attraction.

Care is similar whichever model you buy

Both trimmers need cleaning and blade oil before and after use. Their rinse-clean construction makes clearing away clippings convenient, but it doesn’t remove the need for lubrication. Let the parts dry after rinsing, keep the adapter dry, and follow the oiling points in the supplied instructions. For a fuller explanation of routine upkeep, see how to clean your beard trimmer.

Our recommendation

For a consistently short beard, we’d buy the ER-GB42 and enjoy the simplicity of one adjustable comb. The ER-GB80 is the stronger choice when a fuller style, finer edge work or faster charging matters to you. Those are useful upgrades you can feel in the routine, rather than extra settings to buy just for the sake of having them.