Saeyang Marathon K38 Crafien Mini Cordless Review UK (2026)

The Marathon K38 Crafien Mini is Saeyang's black, cordless K38 variant — built around a 2850 mAh battery good for 4–8 hours of work, the SH300 Twist-Lock handpiece, and — unlike some cordless Marathons — a foot drive included in the box. It's priced at £499.

For mobile techs who specifically want a pedal without buying one separately, this is the model built for that.

Quick Verdict

Everything you'd expect from a cordless Marathon is here: knob speed control up to 30,000 rpm, side buttons for foot-drive switching, pause and direction, LED indicators for battery/direction/foot-drive/ pause status, overload protection with its own LED, and an automatic energy-saving mode to stretch the charge between clients. The black housing and rubberised base are built for being carried, not just used at a fixed desk.

Best for: Mobile techs who want a cordless drill that ships with a working foot pedal. Compare with: K38 PRO + BS30 at £429 — a brushless motor and 35,000 rpm for £70 less, though it doesn't include a foot drive.

What's in the Box

• K38 Crafien Mini control base (cordless, black)
• SH300 handpiece (Twist-Lock)
• Power supply (for charging)
• Foot drive
• Silicone head stand
• Manual
• 12-month distributor warranty

Key Specifications

Saeyang Marathon K38 Crafien Mini Cordless

Torque

Max RPM30,000

K38 Crafien Mini — cordless, 2850 mAh battery for 4–8 h per charge, SH300 Twist-Lock handpiece, foot drive included, black housing.

£499

Buy at Coheal UK

What Stands Out

A Foot Drive Actually Included

Cordless Marathons don't always ship with a pedal. The Crafien Mini does — the foot drive is in the box, along with a side button to switch control to it, so you're not sourcing one separately if hands-free control matters to your setup.

Quiet, Energy-Conscious Running

An automatic energy-saving mode kicks in to conserve the battery between uses, and Saeyang lists the unit as quiet in operation — useful for close client work over a full mobile round.

Full LED Status at a Glance

Battery level, rotation direction, foot-drive mode and pause status are all shown via LED indicators, so you always know the machine's state without guesswork — important when you're away from a backup unit.

Pros and Cons

Who Should Buy This?

Buy it if:

• You want a cordless Marathon that ships with a working foot pedal
• You specifically want the black finish
• 30,000 rpm and 4–8 hours of runtime cover your working day

Consider the K38 PRO + BS30 instead if:

• You want the newer brushless motor, a higher 35,000 rpm ceiling, and don't mind buying a pedal separately, for £70 less

How It Compares

Final Verdict

Taken on its own, the K38 Crafien Mini is a capable cordless drill with a genuinely useful inclusion: a foot drive in the box. But held up against its stablemate, the K38 PRO offers a brushless motor and a higher rpm ceiling for £70 less. Most mobile techs should buy the PRO and add a pedal only if they need one; choose the Crafien Mini specifically if the included foot drive or the black finish is what you're after.

Rating: 8.6/10 — a solid cordless option, best suited to techs who want the pedal included from day one.

Stocked and sold by Coheal UK — UK stockist of genuine Saeyang equipment, sourced through Saeyang's official EU distribution network.