640 GH640 GP640 GH 640 6 V 4.5 Ah Agm Gel Like 4Ah 4.2 Ah Battery CSB GP 4.5 Ah 5Ah Compatible: Amazon.de: Electronics & Photo
Xtreme 12V 4Ah AGM Gel Battery Deep Cycle Maintenance Free UPS Backup Power Unit: Amazon.co.uk: Electronics & Photo
VANTTECH LBXR36 4.0Ah Replacement for Black and Decker 40V Battery Lithium-Ion MAX LBX2040 LBXR2036 LBX2540 LBX1540 LST540 LCS1240 LST136W Compatible for Black and Decker Cordless Tool(2Pack) - Amazon.com
Jopower JP12-4.0 12V 4Ah Battery
Amazon.com: Casil 6V 4Ah Replacement Battery Compatible with JohnLite cy-0112-6.40 Spotlight : Health & Household
Amazon.com: ExpertPower YTX4L-BS Power Sport SLA Battery : Automotive
RYOBI P108 4AH One+ High Capacity Lithium Ion Battery For RYOBI Power Tools (Single Battery) - Cordless Tool Battery Chargers - Amazon.com
RIDGID 18V 4.0 Ah MAX Output Lithium-Ion Battery (2Pack) & 18V 2.0 Ah MAX Output Battery w/ 4.0 Ah MAX Output Battery & Charger AC8400242-AC9540 - The Home Depot