https://www.homedepot.com/p/Milwauk...act-Battery-Pack-2488-20-48-11-2420/337129347 Milwaukee M12 12-Volt Lithium-Ion Cordless Soldering Iron + 2.0Ah Compact Battery Pack (2488-20-48-11-2420) on sale for $89. Shipping is free, otherwise free store pickup is available where stock permits.