M4 Extension Tube (For 18650 Battery) - Nitecore Singapore
M4 Extension Tube (For 18650 Battery) - Nitecore Singapore
M4 Extension Tube (For 18650 Battery) - Nitecore Singapore
M4 Extension Tube (For 18650 Battery)
M4 Extension Tube (For 18650 Battery) - Nitecore Singapore
M4 Extension Tube (For 18650 Battery) - Nitecore Singapore

M4 Extension Tube (For 18650 Battery)

Designed to fit the Speras M4, so you can use a larger 18650 battery to increase runtime by up to 3x.

Regular price$9.00 SGD
/
Tax included.
  • Backed by Our 60-Day Ironclad Guarantee
  • Door to Door Delivery + Easy Returns
  • Dedicated After-Sales Support

M4 Extension Tube (For 18650 Battery) - Nitecore Singapore

3x your runtime for longer ops and use

Making it a true compact searchlight that far outshines other lights of similar sizes.

  • Made for Spearas M4
  • 1pc is enough to fit a 18650 battery
  • 3x your runtime with a 3500mAh 18650 battery
  • Easy screw in installation
  • Extends handle length for better grip

OUTPUT AND RUNTIME

MODE LUMENS RUNTIME DISTANCE
INTENSITY
Turbo 1320
1h10min 652m
106,400 cd
High
450
1h15min 387m
37,500 cd
Medium 220 2h 261m 17,000 cd
Low 60 7h45min 130m 4,250 cd
ECO 0.5 220h 17m 75 cd
Strobe
1320
-
-
-
SOS
220
- -
-

*CERTIFIED ANSI/PLATO FL1 2019 Standard

ANSI/PLATO FL 1 2019 Standard is a set of flashlight performance guidelines that confirms the light you're buying has been tested to spec, and you're not buying into false performance claims.

About SPERAS (Not Nitecore)

M4 Extension Tube (For 18650 Battery) - Nitecore Singapore

Speras is a visionary brand driven by a passion for innovation and a commitment to providing cutting-edge flashlight solutions for adventurers and professionals alike.

M4 Extension Tube (For 18650 Battery) - Nitecore Singapore

What's In The Box

  • 1x M4 Extension Tube
  • 2x Spare O-Ring
  • 18650 batteries NOT INCLUDED

You’re Backed by Our 60-Day Ironclad Guarantee

Try it for 60 days. If it’s not right for you, send it back.

We stand behind our gear. If you’re not happy with your purchase, just return the full package within 60 days and we’ll issue a full refund—no fuss, no forms, no hoops to jump through.

What Happens After You Order

  • You’ll get an instant order confirmation email with your receipt.
  • We’ll pack your order the next working day and send you a tracking number once it’s on the way.
  • From the moment you order to the moment it reaches your hands, we’re here to keep you updated and supported.

When will I receive my gear?

  • Singapore: Delivered to your doorstep in 4–6 working days.
  • International: Arrive within 10–14 working days.

Returns and warranty

  • Every product comes with a 1 to 3-year replacement warranty (depending on the item).
  • If anything isn’t working right, just let us know. We’ll make it right.

FREE Gift with Purchase: Limited Edition Ember Shard Whistle

Spend $99 or more today, and we'll automatically include a limited-edition Glow-in-the-Dark Ember Shard Whistle when packing your order.

Charge it quickly under sunlight or your flashlight, and enjoy its subtle glow throughout the night—perfect for marking gear, emergency kits, or attaching to your bag.

Limited quantity available. Claim yours now!


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