Plantar Fasciitis Socks for Men and Women - Foot Compression Sleeves for Arch Pain - Heel Spur - Achilles Tendon Pain - Foot Sweling by PURE SUPPORT 2.2 amp hour capacity for longer run times Use of quality 1.2 Volt Ni-Cad Battery Cells for Dewalt DW9091 XR Battery Packs 14.4 Volt Batteries are under-rated, tested out at 2200 mAh, 19.65 Volts