Andis Slimline Pro Li vs Slimline 2, T Outliner & Wahl Detailer

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There’s a lot of love out there for Andis Slimline Pro Li, and I’ve got to say it’s fully deserved.

This neat little trimmer is solid for anything from necklines to light touchups or detailing work.

It’s also one of the lightest barber-grade trimmers. At only 0.3 lbs, it’ll never cause you any hand fatigue even on the busiest of days.

Let’s talk about it. In particular, I’ll give you some advice regarding:

Wahl Cordless Detailer 5 Star

Wahl 5 Star Cordless Detailer

Sharp and wide T blade for crisp lines and supreme neckline trimming. Expensive, but in a league of its own.

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Andis T Outliner

The dependable workhorse option. Sharp blades, constant power (corded), reliable. A long line of barbers depend on this model.

Andis Slimline Pro Li

Andis Slimline Pro Li

The best of the Slimline family. Longest battery life, best cutting blade and a 6000 SPM strong rotary motor.

Now let’s get to the full review. Choose whichever section interests you the most.

New vs old:
Andis Slimline Pro Li vs Slimline Pro vs Slimline 2

Slimline Pro Li

Here’s the thing: Andis don’t really manufacture the older #32655 Slimline Pro. However, as some merchants still have it in stock, people have been asking me what’s up with these two.

Whatever the Pro does, the newer #32400 Slimline Pro Li does better. Highlights include:

  • A 2 hour Lithium-ion battery life, instead of the older NiMH with the Pros.
  • Faster rotary motor: 6000 strokes per minute against 5700.
  • D8 blade over the older, not as close-cutting D7 blade.

What about the Slimline 2, though?

Very similar conclusions. While the Slimline 2 trimmer has the same motor as the Pro Li, it suffers from two drawbacks:

  • The battery life isn’t as reliable and requires a longer charging time.
  • The blade isn’t a part of Andis’ D-series T blades. It’s not optimal for barber-grade edging or lineup work.

If you’re a professional, I’d definitely go for the Pro Li in this case. You need power and reliability, and the trimmer isn’t that much more expensive than the other two models.

Andis Slimline Pro Li

Andis Slimline Pro Li

The best of the Slimline family. Longest battery life, best cutting blade and a 6000 SPM strong rotary motor.

Wahl’s competitors:
Slimline Pro Li vs Wahl Detailer or Beret

If you ask a bunch of barbers, there’s a good chance some of them will actually have both a Pro Li and a Detailer.

I’ve been a longtime satisfied user of the praised Professional Detailer too:

Wahl Detailer Blade

Its very compact size (just 5″) makes it one of the smallest high-end trimmers on the market. While not as lightweight as the Pro Li, it’s still only 0.43 lbs. Easy to work with and maneuverable for trickier areas like around the ears.

In terms of crisp lines, Detailers hit as good as the Pro Li. A big advantage: unlike the D8 blade, the opening under the Detailer blade isn’t as wide.

The Pro Li blade design allows for trimmed hair to fall right into that gap. Effectively this means you need to clean it more frequently compared to how Wahl designs their blades.

That said, the Detailer is corded and a bit noisier. Also, Slimlines work a bit better when zero-gapped.

There’s a cordless Detailer out too. It improves everything over the corded version, but costs a pretty penny as I’ve noted in my comparison of Wahl trimmers. As a 5 Star Detailer, it also features a wider T-blade which deals better with bigger surfaces and necklines.

Wahl Cordless Detailer 5 Star

Wahl 5 Star Cordless Detailer

Sharp and wide T blade for crisp lines and supreme neckline trimming. Expensive, but in a league of its own.

As for the Beret or the Sterling Mag…

These are Wahl’s quietest hair trimmers. The blade also has a softer touch. While not as good as the Pro Li for bulk trimming, these two are perfect for more sensitive areas.

Their silent operation really helps with kids, if you do kids’ haircuts or lineups. The finer teeth of the Beret, however, might stall with bigger volumes of facial hair.

Finally, the guards of the Pro Li are more diverse. The Beret attachments start from 1/8″, so you can’t really go comb-short with it as you can with Andis.

The classics:
Andis Slimline Pro Li vs T Outliner

OK, now that’s the classic battle for those who want to stick to Andis trimmers only.

Make no mistake – the high-rated T Outliner is way more powerful.

First, it deals with an electromagnetic, not a rotary motor. This allows it to unleash 7200 SPM of pure trimming power compared to Pro Li’s 6000 SPM.

But there’s a dark side to that… heat-ups and weight. The T Outliner will turn hot if you work with it more than 10 minutes and it weighs double at 0.7 lbs.

Andis T Outliner

Another thing that the T Outliner does better is its famous T blade. Those close-cutting blades cut sharper and form more precise, crisper lines whatever you decide to do. They heavily outperform the D8 blade of the Pro Li.

Additionally, the T-blade covers a wider area. You can branch out to better bald fade finishes this way.

Corded, heavier, heats up…But comes with more power and better blades.

What can you do?

First, you can opt for the cordless T Outliner. While it has a slightly shorter battery life (100 minutes vs 2 hours), it’s basically lighter, mobile upgrade. Costs quite a bit, though.

Second, you can swap the D8 blade and put a T Outliner blade like this on your Slimline Pro Li. It might take some time and involve a bit of sweaty work, but it’s doable.

Here’s a video that shows what the process looks like:

If you decide to go for it, let me know the results!

Hope this was an informative review of Andis Slimline Pro Li and several alternatives it battles things out with. If you’ve worked with any of these trimmers, let me know what your impressions are. If you’re looking for a clipper to supplement your trimmers with, check my Wahl Senior review. One of the best pro machines on the current market, hands down.

Andis Pro Li Featured

9 thoughts on “Andis Slimline Pro Li vs Slimline 2, T Outliner & Wahl Detailer”

  1. Hi again, Alex. Another wonderful article, thank you very much. I’d like to ask you some advice as I use currently Wahl Balding as my trimmer. I really like this clipper and think that with the full set of combs it can be the sole clipper for home use as it can remove bulk, do a fade and all trimming work. The adjustable clipper can work faster, but for home use the difference is minimal.

    BUT… while I use it on other members of the family, I struggle to use it on myself. Big and heavy. I was thinking about getting the Detailer, T Outliner or Slimline Pro Li, but at least the T Outliner is almost as big and heavy as my Wahl Balding clipper. Is there any added value for self haircut from other two or I just continue practicing and improving my Wahl Balding mastery?

    Also what do you think about cordless clippers and trimmers for home use? I was told the batteries simply don’t hold two weeks between uses and one needs to charge after use and cleaning, but also before use, otherwise they will die in the middle. Too bad for last minute touch ups.

    Thank you.

    1. Hey again Vincent,

      So you have the Oster A5 you mentioned in the other post, and a Wahl Balding 5 star? If you have the latter, it’s a full-sized clipper focused mainly on balding cuts as you said.

      In that sense, you’ll find the blade of trimmers like the Pro Li, Detailer or Outliner a bit too small for efficient haircuts. With the Pro Li for sure you can’t do haircuts easily, as its T blade is so small and its motor isn’t optimal for bulk cutting.

      Some people shave their whole head with the Detailer (get the wide T-blade #8081 model in this case). It works, but especially with thicker hair it’s…sluggish. I suggest you stick to the Balding 5 star.

      In general, trimmers aren’t that great for bulk hair cutting. Btw, the 5 star Balding works ok with shorter-sized combs. Some of the bigger lengths one might be an issue, as in its essence, its blade is designed for ultra short cuts. They might not fit optimally (as in: fit is too loose etc.)

      Cordless is OK, depending on your needs. My favorite would be the Cordless Magic Clip from Wahl; this is easily the best cordless solution out there for barbers and home users alike. Not sure who told you about the two weeks thing, but at least with the Magic Clip that shouldn’t happen.

  2. Alex, thanks for your replay. I will keep both my A5 (never used it before on myself, will try) and my Wahl Balding. I will use them as clippers, but, as mentioned in the first post, I struggle to use the Balding clipper on myself to make a nice looking neckline and so on. Thus I was thinking about the trimmer exclusively for finishing work, if there is enough added value comparing to my Balding.

    I have no problem to use Wahl Balding as a trimmer on my son, for example, be it for finishing of the haircut or a little touch up in the neck, but not on myself.

    I understand the trimmer won’t replace the clipper and I don’t have plans to do so, it’s just for the ear area and the neck I struggle to properly cut on myself.


    1. Hey Vincent,

      Gotcha! Well, that’s my personal experience, but I have both a clipper and a trimmer exactly for this reasons. I love my Detailer (the black, smaller T blade one you see in this article) for trimming around my ears, shaping my sideburns and neckline. Quick and clean work.

      In the case of such touchups, the Pro Li would be equally fantastic, as it’s even easier to work with and maneuverable.

      So, from my point of view, it IS worth it to have a neat little trimmer to help around with cleanup work. Especially if your main clipper is something like the 5 star Balding. It’s a bit…don’t know, but a bit brutal, haha, compared to what you can do with either a Detailer or a Pro Li. Or even other clippers!

      An additional option could be the Wahl Beret, which is also a fantastic trimmer for the purposes you wrote about.

      If you can find any of these trimmers on a decent/low price, I’d say go for it. I know that without such a trimmer I’d go crazy!

      Cheers and let me know if you need any other info!

  3. Hey Alex,

    Thanks, I will try to find them. Also will try to investigate this issue of the battery not holding enough charge for 15+ days. It may be less a problem for the trimmer as it’s used more often, but the clipper is usually used every 15-40 days, depending of the busy schedule. Once a week those days, though, why not, we have time.

    Professional barbers never have this problem, because the clippers and trimmers live forever in the charging docks, but I store them on the shelf when not used, so the problem, if it exists, will hit me for sure. I’ve sold all my cordless screwdrivers because of this, no juice when I need them for a quick repair, while my mechanic screwdrivers are ready to serve.

    One more question. I have offers for Wahl Senior, Legend and Magic Clip and surprisingly the Senior is the cheapest. Which one should I get if my experiment with Oster A5 is not good?


    1. Hmm…I wonder if it also dealt with the battery type (Li-Ion or NiCad or Nimh)…Now you made me think, as I’ve never spent more than a week or so without cutting my hair. Shaving it all of the past few years anyways.

      Interesting that the Senior is the cheapest! I’ve had a 5 star Senior and I liked it, even though it’s kinda heavy. I’d say it’s a good choice if you can find it on a better price than the Legend and you don’t need the fade flexibility of the Legend’s special lever (opens up more than usual Wahl clippers).

      The Magic Clip is like a lesser Senior, in a way. Keep in mind that from what I’ve seen, the US version comes with the stronger V9000 motor the Senior has. In Europe or Asian countries, for some reason, it comes with the older V5000 motor.

      Keep in mind that the Senior does get hotter than some other, more ‘standard’ Wahl clippers after prolonged use.

      Hope the A5 experiment goes well so you don’t need to spend more money. As I said, just be extra careful – hope it works out!

      Also wishing you and your family the best through these tough times. Stay healthy and safe!

      Best, Alex

  4. Alex, trying to decide between the the Slimline Pro Li and a Beret. Mainly to cut my 5yo son’s hair, so I’m guessing Beret is definitely the way to go or is it a toss up?

    Also, any thoughts on durability and warranty service between the two?

    Finally, thanks for the Magic Clip recommendation on the other article/thread. So far it’s been a joy to use.

    1. Hi Ken!

      Very happy that you’ve liked the Magic Clip. Here’s to more quality DIY action with its help!

      I’d go with the Beret, yes. I’ve seen a lot of stylists like the Beret/Mag for its quiet operation and they’ve always cited working with a lot of kids as customers being one of the biggest reasons.

      Warranty-wise, both Andis and Wahl are reputable. If you buy the trimmer from an online merchant, always check what warranty the merchant themselves offer. For example on Amazon, check whether it’s the brand/Amazon themselves, or a 3rd party vendor. 3rd party vendors MIGHT have a different (read: shorter) warranty, so be aware of that.

      Durability-wise, I have no qualms with either trimmer. Note the blade design difference I mentioned, where you’d have to clean the Slimline Pro more often/thoroughly.

      Let me know if you have any other questions!

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