米国home depot
$199 USD for M18 18-Volt Lithium-Ion High Output 12.0Ah Battery Pack with Free HIGH OUTPUT XC 8.0 Ah Battery
https://www.homedepot.com/p/Milwaukee-M18-18-Volt-Lithium-Ion-High-Output-12-0Ah-Battery-Pack-with-Free-HIGH-OUTPUT-XC-8-0-Ah-Battery-48-11-1812-48-11-1880/310836896