EGO POWER+ Peak Power 56-volt 21-in Single-stage Brushless Cordless Electric Snow Blower 7.5-Ah (Battery Included and Charger Included) in the Snow Blowers department at Lowes.com
Amazon.com: YTX24HL-BSGEL -12 Volt 21 AH, GEL Type, 350 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery : Automotive
MIGHTY MAX BATTERY 12-Volt 21 Ah 350 CCA Rechargeable Sealed Lead Acid (SLA) Powersport Battery YTX24HL-BS - The Home Depot
High Power Polymer Li-Ion Battery: 25.9v 21Ah (543.9 Wh, 40A rate) with PCM