Ryobi 130166025 Tek4 4-V Lithium-Ion Battery 130166010 130166025 AP4001 Brand-new, genuine Ryobi Tek4 battery, Part# 130166025 Replaces Part # 130166010 and 130166003 Compatible with Ryobi HP54L 4 Volt Li-ion Reversible Screwdriver Includes: (1) Tek4 Battery