Now's the time to buy some Craftsman 4Ah batteries. Lowe's just had the single pack of CMCB204 on sale for $39.99. That sale expired on Monday (6/9/2025), but you can still pickup the two-pack from Ace Hardware or Lowe's for $79.00 — a great opportunity to take advantage of this deal.

Product Overview

The CRAFTSMAN V20 4.0Ah Lithium-Ion Battery (CMCB204) delivers the extra power and runtime needed for demanding jobs across your V20 cordless lineup. Whether you're driving screws, cutting wood, or trimming hedges, this battery keeps your tools running longer between charges.

With double the capacity of a standard 2.0Ah pack, the CMCB204 is ideal for extended tasks and high-drain tools like circular saws, reciprocating saws, or string trimmers. Its compact design still fits easily into tight spaces, while the LED charge indicator gives a quick readout on remaining runtime.

As part of the CRAFTSMAN V20 system, this battery works with every V20 tool and charger, making it a smart upgrade or spare for users who want more uptime on the job or in the yard.

Technical Specs

• Brand: CRAFTSMAN
• Model Number: CMCB204
• Voltage: 20V MAX
• Amp Hours: 4.0Ah
• Battery Type: Lithium-Ion
• Compatibility: All CRAFTSMAN V20 cordless tools and chargers
• Features:
• Long runtime for high-demand tools
• LED fuel gauge
• Lightweight, compact housing
• No memory effect or self-discharge

What It’s Good For

Great for users who need longer runtimes for cutting, sanding, drilling, and trimming. A reliable battery for both jobsite pros and weekend warriors who use multiple V20 tools.

Compared to Other Batteries

Compared to the 2.0Ah or 1.3Ah packs, the 4.0Ah version provides twice the runtime without a major weight increase. It’s the sweet spot between power and portability in the CRAFTSMAN battery lineup.

Also Known As

• CMCB204 V20 MAX 4Ah Battery
• CRAFTSMAN Extended Runtime Battery Pack
• 20V Lithium Battery for V20 Tools
• CRAFTSMAN CMCB204 Replacement Battery

Model Number: CMCB204