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Fanttik S1 Pro vs Milwaukee M4: Grip and Charging Choices

Choose Fanttik S1 Pro if a fixed straight grip and USB-C charging between jobs suit you. Choose Milwaukee M4 2101-22 if you want a handle that also folds into a pistol grip or a prepared spare battery, and will keep its separate charger available.

Published by Pickoryx · Published 2026-10-14

Source checked 2026-10-14 16:21 UTC

Products compared

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The buying question

Is a fixed straight screwdriver enough, or do you need a pivoting handle and a ready spare battery?

Fanttik pairs a fixed handle with in-tool USB-C charging; Milwaukee adds a pistol-grip option and removable packs, with a separate charger to manage.

Quick verdict

When to skip: Skip the S1 Pro if pivoting the handle is essential. Skip the M4 kit if a separate pack-and-charger routine is something you will not maintain.
When the recommendation changes
  • If you need to change handle position, choose the pivoting M4 rather than the fixed S1 Pro.
  • If you cannot plan charging breaks, decide whether keeping a spare M4 pack charged fits your routine.

The differences that matter

Grip Configuration

Fanttik NEX S1 Pro 16-bit Case Set

Fixed straight handle; the S1 Pro specification table marks it as non-pivoting.[1]

Milwaukee M4 2101-22 Two-Battery Kit

The center-pivot handle can be used straight or folded into a pistol grip.[3]

What this changes: Start with the handle position your work calls for. Milwaukee provides a pistol-grip option; Fanttik suits buyers content with a straight tool. Neither shape alone proves comfort or access in a particular space.[1, 3]

The better fit depends on your priorities

Battery And Charging Workflow

Fanttik NEX S1 Pro 16-bit Case Set

A built-in battery charges through USB-C. The screwdriver cannot operate while the charging cable is connected.[1]

Milwaukee M4 2101-22 Two-Battery Kit

The 2101-22 kit supplies two removable M4 batteries and a dedicated charger. Remove the pack from the tool to charge it; a charged spare can be installed.[2, 3, 4]

What this changes: Choose a charge-between-jobs routine or a prepared-spare routine. Fanttik avoids a separate removable-pack setup; Milwaukee allows a pack swap but leaves you managing the spare and its charger. This does not establish longer runtime.[1, 2, 3, 4]

The better fit depends on your priorities

Best for your routine

A straight tool for jobs separated by charging breaks

Best fit: Fanttik NEX S1 Pro 16-bit Case Set

Based on listed features, not comparative testing.

The S1 Pro fits this routine without managing removable packs; powered use must stop while its charging cable is connected.

View Fanttik NEX S1 Pro 16-bit Case Set on AmazonPaid link

Switching between straight and pistol-style handling

Best fit: Milwaukee M4 2101-22 Two-Battery Kit

Based on listed features, not comparative testing.

The M4 supplies both handle positions. Check the actual tool against your working space; pivoting alone does not establish clearance.

View Milwaukee M4 2101-22 Two-Battery Kit on AmazonPaid link

Keeping a charged spare ready for the next job

Best fit: Milwaukee M4 2101-22 Two-Battery Kit

Based on listed features, not comparative testing.

The two-battery 2101-22 kit supports a swap when one pack is depleted, provided the other is charged.

View Milwaukee M4 2101-22 Two-Battery Kit on AmazonPaid link

Value and trade-offs

One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.

If the M4 costs more, the useful reasons to pay are its alternative handle position and spare-pack workflow. If neither matters, those extras do not resolve a need for you.

There is insufficient verified price history here to recommend buying now or waiting.

Limitations

  • Neither screwdriver was tested hands-on. No comparative conclusion is offered about tightening accuracy, work speed, runtime, comfort, durability or safety.
  • Handle positions describe configuration, not guaranteed access to a specific fastener. Check the tool and bit against your working space.

Questions shoppers ask

Which package should I check before ordering?

For Fanttik, check the S1 Pro case set with 16 bits. For Milwaukee, check 2101-22: the manufacturer lists the 2101-20 tool, two 48-11-2001 M4 packs and one 48-59-2001 charger. Do not assume another M4 listing contains the same charging kit.

Methodology and sources

Compared handle configurations, charging steps and the exact packages, separating those features from untested performance.

AI assisted source research and writing. Pickoryx did not test either tool.

View 4 sources
  1. 1.Fanttik S1 Pro Cordless Electric ScrewdriverFanttik · Official specifications · Source checked 2026-10-14 16:21 UTC
    Evidence used on this page
    • Product Specification: S1 Pro column, Pivotable row; Powerful Chargeable Battery; Magnetic Case; FAQ charging-cable question: Non-pivoting S1 Pro, built-in battery with USB-C charging, no operation with charging cable connected, and 16-bit case.
  2. 2.M4 1/4-inch Hex Screwdriver Kit 2101-22Milwaukee Tool · Official specifications · Source checked 2026-10-14 16:21 UTC
    Evidence used on this page
    • 2101-22; In The Box: Exact kit lists 2101-20 tool, two 48-11-2001 M4 batteries and 48-59-2001 charger.
  3. 3.2101-20 M4 Screwdriver Operator’s ManualMilwaukee Tool · Official specifications · Source checked 2026-10-14 16:21 UTC
    Evidence used on this page
    • Printed page 4: Removing the Battery from the Tool, Adjusting the Handle: Manual for the included tool documents removable battery and straight or pistol-grip handle positions.
  4. 4.48-59-2001 M4 Charger Operator’s ManualMilwaukee Tool · Official specifications · Source checked 2026-10-14 16:21 UTC
    Evidence used on this page
    • Printed page 4: Charger Operation, When to Charge the Battery Pack, How to Charge the Battery: Remove the battery from the tool and charge it in the designated M4 charger.

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