Our verdict: The Wahl Aqua Blade Wet/Dry Stubble & Beard Trimmer 9899-800 ranks 3rd of the 10 beard trimmers we compare, with 8.5 out of 10. It takes our Best Premium badge.
Wahl Aqua Blade Wet/Dry Stubble & Beard Trimmer 9899-800
8.5/10Best Premium
The Wahl Aqua Blade 9899-800 is a cordless, rinseable stubble and beard trimmer that cuts from 0.2mm to 25mm with 16 push-on combs. It suits a man who wants one trimmer for both close stubble and a longer beard.
Wahl lists up to 180 minutes of runtime from a one-hour charge
Five-year warranty plus a lifetime blade guarantee
Keep in mind
The comb set is large and easy to lose track of without a proper storage case
Combs are push-on rather than a dial, so changing length takes longer than on a wheel model
The design dates from 2018, so it is one of the older models here
Why the Wahl Aqua Blade Wet/Dry scores 8.5
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 are2nd of 10
How many rated it4th of 10
How new it is9th of 10
Level with the Philips OneBlade 360 Face QP2734/30
The Philips OneBlade 360 Face QP2734/30 and the Wahl Aqua Blade Wet/Dry Stubble & Beard Trimmer 9899-800 score the same, so either is a safe pick. The Philips OneBlade 360 Face QP2734/30 goes first because it is the newer design. The Wahl Aqua Blade Wet/Dry Stubble & Beard Trimmer 9899-800 leaves owners a little happier. It takes our Best Premium badge.
About the Wahl Aqua Blade Wet/Dry
The Aqua Blade is a single-head cordless trimmer with a lithium-ion battery. Wahl says the blade cuts 60% closer than its standard trimmer blade, which is how it reaches the 0.2mm setting. The whole unit is washable, so it can be rinsed under a tap after use and used wet or dry.
Length is set with guide combs that push onto the head. Wahl lists 16 of them, covering 0.2mm to 25mm. There is no dial, so changing length means swapping the comb.
Wahl gives a full charge as 60 minutes, for up to 180 minutes of runtime. A one-minute quick charge gives about three minutes of use. Wahl's FAQ puts a full charge at about three months of average use.
The box holds the trimmer, 16 attachment combs, a beard comb, a storage pouch, blade oil, a cleaning brush, a charger and an instruction booklet. Wahl backs it with a 5-year warranty on parts other than the blades, from the date of purchase, and a lifetime guarantee against the blades going blunt.
What owners report about the Wahl Aqua Blade Wet/Dry
Written feedback on this exact model is thin on the retailer pages we could open, so this is a short picture. Owners who comment describe it as easy to use, well designed and good value. They say it trims accurately and gives a close finish on stubble, and one finds it easy to handle in one hand.
One owner says it copes with thick hair better than expected. Another was disappointed that it does not give a wet shave, so treat it as a trimmer rather than a razor. We found no pattern of battery or build failures in what we read, but we also found little long-term feedback.
T3's review headline calls it a solid trimmer that excels at close cutting, which matches the owner comments about stubble.
Who the Wahl Aqua Blade Wet/Dry suits
It suits a man who keeps stubble at a short, even length most of the time but sometimes grows it out, and who wants to rinse the trimmer clean under a tap. The 0.2mm to 25mm range is wide, and the long battery life suits travel.
Look elsewhere if you change length often or want a quick adjustment: the Braun Beard Trimmer Series 5 BT5525 or Philips Beard Trimmer Series 5000 BT5502/13 use a dial. If you want a trimmer, edger and shaver in one, the Philips OneBlade 360 Face QP2734/30 is closer to that.
Questions about the Wahl Aqua Blade Wet/Dry
How long does the Wahl 9899-800 battery last?
Wahl lists up to 180 minutes of runtime from a 60-minute charge. Its FAQ says a full charge gives about three months of average use.
Is the Wahl Aqua Blade 9899-800 waterproof?
Wahl calls it fully washable and rinseable, and says it can be used wet or dry. That includes the shower.
Does the Wahl 9899-800 come with a lifetime blade guarantee?
Yes. Wahl gives a lifetime blade guarantee, which covers blades that become blunt. It does not cover other failures. The separate 5-year warranty covers all parts except the blades, from date of purchase.
How many combs come with the Wahl Aqua Blade 9899-800?
Wahl lists 16 attachment combs plus a beard comb. Together they cover 0.2mm to 25mm.
Can I get replacement blades or parts for the Wahl 9899-800?
Wahl's page does not list replacement parts for it. Because the lifetime guarantee covers blunt blades, contact Wahl UK before buying a blade elsewhere.
Other beard trimmer picks
The other badge winners in our beard trimmers ranking.
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 17 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.
