We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two black 4 volt lithium ion power tool batteries with 48-11-2001 label

BatteryJack inc.

BatteryJack inc. Banshee 4V 3500mAh 2X Battery 48-11-2001

SKU CH-A2Z4-70W31

Two-pack of 4 V lithium-ion replacement batteries rated at 3500 mAh for Milwaukee M4 cordless tools

  • TypeBatteries
  • Parts2 Year Warranty
  • Two-pack keeps a spare ready for every job
  • 4 V Li-ion chemistry powers compatible M4 cordless tools
  • 3500 mAh capacity extends runtime between charges
  • Direct replacement for Milwaukee part 48-11-2001
  • Two-year warranty covers defects in materials and workmanship

Two-Pack 4 V Li-Ion Batteries

This twin-pack supplies two 4 V lithium-ion batteries rated at 3 500 mAh each. They are built as direct replacements for Milwaukee M4 cordless tools and carry the 48-11-2001 part number. The set suits DIYers and tradespeople who want spare power on the job.

Black Housing with Two-Year Coverage

Each cell block uses a black Li-Ion casing designed to fit the M4 slide mount without modification. The supplier backs the pack with a two-year warranty, indicating confidence in the cell quality and assembly. No extra chargers or adapters are required for daily swaps.

Replaces Original 2 000 mAh M4 Packs

These units step up from the standard 2 000 mAh originals, giving longer run-time per charge for the same 4 V platform. The upgrade makes sense when extended use between charges matters more than keeping the original capacity. Buyers needing higher voltage or a different form factor should look elsewhere.

Highlights

  • Two-pack keeps a spare ready for every job
  • 4 V Li-ion chemistry powers compatible M4 cordless tools
  • 3500 mAh capacity extends runtime between charges
  • Direct replacement for Milwaukee part 48-11-2001
  • Two-year warranty covers defects in materials and workmanship

Specifications

TypeBatteries
BrandBanshee
Parts2 Year Warranty

Questions about this item

Does the 4 V lithium-ion pack deliver the listed 3500 mAh or the 2000 mAh shown in the highlights?

The supplier title states 3500 mAh while the description and highlights list 2000 mAh; the actual capacity is 2000 mAh.

Which Milwaukee M4 cordless tools accept the 48-11-2001 replacement code?

The pack fits all M4 cordless tools including models 0490-20, 0490-22 and GD-MIL-M4.

How do I install the battery without damaging the latch mechanism?

Align the pack with the tool’s battery rails, slide it in until the release tabs click, then tug gently to confirm it is locked.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.