CRAFTSMAN V20 Weed Wacker Cordless String Trimmer and Edger, Weed Eater Includes 2.0 Ah Battery and Charger, Lightweight, Extended Runtime, 2 Speed (CMCST900D1)

What It Is

This is the official CRAFTSMAN V20 2.0 Ah battery and charger kit (CMCST900D1) designed to power the CMCST900 string trimmer/edger. It also works with any tool in the CRAFTSMAN V20 cordless platform, including mowers, blowers, and chainsaws.

Fitment & Compatibility

• Model check: Only fits CRAFTSMAN V20 tools (battery port is proprietary). Not compatible with CRAFTSMAN 19.2V, 60V, or other brand platforms.
• Battery specs: 20V max, 2.0 Ah (lithium-ion). Lower capacity than the 4.0 Ah or 5.0 Ah options—expect ~20-30 minutes runtime on a trimmer at medium speed.
• Charger: Includes a standard V20 charger (about 1 hour charge time). Works with all V20 batteries.
• Tool compatibility: Confirmed fit for CMCST900 trimmer; also works with CMCST920, CMCMW200 mower, and older V20 tools (check your tool’s battery port shape).

Key Things to Know

• Runtime is short for larger yards: 2.0 Ah battery will trim a ¼-acre lawn on one charge at speed 1. Consider the 4.0 Ah (CMCST920) for bigger jobs.
• No battery gauge: This battery lacks a fuel gauge LED—you’ll need to test power by pulling the trigger. Newer V20 batteries have a button/light indicator.
• Install is trivial: Slide battery onto tool until it clicks. No tools, no wiring. Removal requires pressing both side release tabs.
• Common gotcha: The charger fan is loud but normal. If battery won’t charge, check contacts for grass debris; wipe with a dry cloth.

Should You Buy It

Buy this if you already own a CRAFTSMAN V20 tool and need a spare battery or a replacement for the original 2.0 Ah pack. It’s a good value for small yards or light trimming, but skip it if you have a large property—upgrade to a 4.0 Ah or 5.0 Ah battery for longer runtime.