MEIRIYFA DC Converter with Battery Alligator Clip USB Charging Adapter, Motorcycle DC 12V 24V to 5V 3A 4-Port USB Multiport Power Buck Fast Charger for Phones Tablets Navigation Devices - 70CM: Amazon.co.uk:
18V Multi Fast Battery Charger 48-59-1804 with 4 Port 2 USB Charger Compatible with Milwaukee M18 14.4V-18V XC Lithium Battery 48-11-1812 48-11-1865, 48-59-1804 48-11-1862 48-11-1850 48-11-1852: Amazon.co.uk: DIY & Tools
Milwaukee M12 and M18 12-Volt/18-Volt Lithium-Ion Multi-Voltage 6-Port Sequential Rapid Battery Charger (3 M12 and 3 M18 Ports) 48-59-1807 - The Home Depot
Makita DC18SF Multi Four Port Li-Ion Charger 14.4v - 18v