Dewalt Cordless Mower Question: Why 20V Max and Not FlexVolt?

A reader asked a great question about Dewalt’s cordless mower battery platform choices.

DeWALT DCMW220P2 - 20V MAX 3-in-1 Cordless Lawn Mower

Have a question about DEWALT 20V MAX 21 in. Battery Powered Self Propelled Lawn Mower with (2) FLEXVOLT 12Ah Batteries & Charger? - Pg 2 - The Home Depot

60V MAX* 17 in. Brushless Attachment Capable String Trimmer Kit

DeWalt 60V MAX 21 Next-Gen Brushless RWD Self-Propelled Mower Kit DCMWSP650Y2

The Dewalt DCD999B features a heavy-duty 1/2 in. ratcheting nitro-carburized metal chuck with carbide inserts for superior bit gripping strength. The 3-mode LED provides lighting in dark or confined spaces up to 20x brighter than the Dewalt DCD985. Spotlight mode features a 20-minute shutoff function, allowing for extended work time in dark or confined spaces.

DeWalt 20V Max Brushless Cordless 1/2 in. Hammer Drill/Driver

DEWALT Z254 54 Kawasaki Gas Hydrostatic Commercial Zero-Turn Mower - 47AKBCA7038

Features the power of corded with the freedom of cordless. The 20v/60v Max battery pack changes voltage when you change tools, powering a line of powerful 60V Max tools, 120V Max tools and backwards compatible to existing 20V Max tools and chargers. The battery pack is smart enough to know when to provide runtime for 20V Max tools (6.0Ah) and power in the new 60V max and 120V Max tools. LED state of charge display. Durable construction with a single piece cell holder.

DeWalt DCB606 FLEXVOLT 60V Max Battery

DEWALT FLEXVOLT 20 Volt and 60 Volt MAX Lithium-Ion 6.0 Ah Tool Battery - Power Townsend Company

Bought this battery about a year ago and it don't charge. I sent my receipt to dewalt and they gave me a new one. My question is can I salvage this battery

The Grinder has up to 54% more power when paired with a Flexvolt battery. The brushless motor delivers 1550 max watts out and up to 9000 rpm. Kickback Brake engages with maximum force to quickly stop the wheel and shut off the grinder when a bind-up occurs. E-Clutch shuts down the motor in under a tenth of a second when a pinch/stall is detected. E-Switch Protection requires the trigger switch to be cycled turned off on in the event of a power outage or other unexpected shutdown to restart.

DeWalt DCG416B 20V Max FLEXVOLT Advantage Brushless 4-1/2 in. - 5 in. Paddle Switch Angle Grinder (Tool-Only)

DEWALT 2X20V MAX 21-1/2 in. Brushless Cordless Push Mower - DCMWP233U2

DEWALT 20V MAX* Lawn Mower, 3-in-1, 2 Batteries (DCMW220P2) : Patio, Lawn & Garden

Have a question about DEWALT 20V MAX 21 in. Battery Powered Self Propelled Lawn Mower with (2) FLEXVOLT 12Ah Batteries & Charger? - Pg 2 - The Home Depot