Is the Philips BT3665/15 good for long beards?

Yes. Its 10.5 to 20 mm range and 40 steps suit medium to long beards. It cannot cut short stubble below 10.5 mm.

Can I use it in the shower?

Yes. It is fully waterproof and rated for wet or dry use, so you can trim in the shower and rinse it afterward.

How long does the battery last?

Philips rates it at up to 80 minutes of cordless use. A full charge takes about 4 hours over USB-A.

Does it come with a charger?

It charges by USB-A at 5 V and 1 A or higher. Check the box contents, since only a cleaning brush is listed as included.

Do the blades need oiling?

No. The self-sharpening metal blades are rust-resistant and need no blade oil.

How does it compare with the Philips OneBlade?

The BT3665/15 is a beard trimmer for longer lengths with many steps. The OneBlade is aimed at short stubble and edging, so they serve different jobs.

Where is the Philips BT3665/15 Shaver cheapest?

At Techinn.com, for $38.99, as of our latest check.

What do buyers say about the Philips BT3665/15 Shaver?

Rated 4.4 out of 5 from 783 ratings.

Philips BT3665/15 Shaver

Best price now

$38.99at Techinn.comChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Techinn.com

Philips BT3665/15 Shaver

Best price now

$38.99at Techinn.comChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Techinn.com

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $38.99 at Techinn.com on Nov 9.

Our take on the Philips BT3665/15 Shaver

The Philips BT3665/15 is a cordless beard trimmer with a metal self-sharpening blade and 40 length settings from 10.5 to 20 mm. It runs up to 80 minutes on a lithium-ion battery, charges over USB-A, and is fully waterproof for wet or dry use. It suits men who keep longer beards and want precise, repeatable lengths without oiling blades. Against rivals, it stands out for its long runtime and many steps, but its 4-hour charge time and lack of a travel lock or extra attachments are common trade-offs at this level.

Best forMen with medium to long beardsShower and sink trimmingTravelers with a USB chargerBuyers wanting many length steps

Pros

40 precision steps give fine length control
Up to 80 minutes of cordless runtime
Self-sharpening metal blades need no oil
100% waterproof for wet or dry use
USB-A charging works with common adapters

Cons

4-hour charge time is slow
No blade oil or travel pouch included
Length range tops out at 20 mm, so no short stubble settings
Charging indicator only, no runtime display

Philips BT3665/15 Shaver prices at every store

Techinn.comNew
In stockShips from abroad · duties may apply
$38.99Checked Nov 9
Visit Techinn.com

Philips BT3665/15 Shaver price history

Lowest price we've seen: $38.99 on Nov 9 at Techinn.com. Tracked across 1 store since Nov 9.

What reviewers say

4.4 / 5783 ratings

Owners rate it well for its long battery life, waterproof body and easy length adjustment. Complaints center on slow charging and the limited attachment set.

What people mention

BatteryPraisedOwners say a single charge lasts through many trims.
ChargingCriticisedReviewers find the four-hour charge slow and wish for faster top-ups.
WaterproofPraisedUsers like rinsing the trimmer under the tap after use.
Length settingsPraisedThe 40 steps are described as precise and easy to lock in.
AccessoriesCriticisedBuyers note the box is sparse, with only a cleaning brush.

Specifications

Cordless: Yes
Usage Type: Trimmer
Body Area: Beard
Product Type: Trimmer
Wet / Dry Use: Yes
Multiple Heads: Yes
Water Resistant: Yes, 100% waterproof
Cutting Lengths

Questions and answers

Is the Philips BT3665/15 good for long beards?: Yes. Its 10.5 to 20 mm range and 40 steps suit medium to long beards. It cannot cut short stubble below 10.5 mm.
Can I use it in the shower?: Yes. It is fully waterproof and rated for wet or dry use, so you can trim in the shower and rinse it afterward.
How long does the battery last?: Philips rates it at up to 80 minutes of cordless use. A full charge takes about 4 hours over USB-A.
Does it come with a charger?: It charges by USB-A at 5 V and 1 A or higher. Check the box contents, since only a cleaning brush is listed as included.
Do the blades need oiling?: No. The self-sharpening metal blades are rust-resistant and need no blade oil.
How does it compare with the Philips OneBlade?: The BT3665/15 is a beard trimmer for longer lengths with many steps. The OneBlade is aimed at short stubble and edging, so they serve different jobs.
Where is the Philips BT3665/15 Shaver cheapest?: At Techinn.com, for $38.99, as of our latest check.
What do buyers say about the Philips BT3665/15 Shaver?: Rated 4.4 out of 5 from 783 ratings.