My Makita 3/8 drill from the mid 90's. Still using the original battery! Forgotten about in the bottom of a drawer for a decade. Charged it up and it's good to go.
Makita 18.0 V Hammer Drill, Battery Included, 1/2 in Chuck XPH03MB | Zoro
Makita 18V LXT® Lithium‑Ion Sub‑Compact Brushless Cordless 2‑Pc. Combo Kit (2.0Ah)- Get at GUS!
Makita 18V LXT Lithium-Ion High Capacity Battery Pack 3.0Ah with Fuel Gauge (2-Pack) BL1830B-2 - The Home Depot