SFK-260 Basic Kit - Built your own Lifepo4 Batteries for RV, Back up Power / Stand by power or power walls using Eve 280 Cells / RCPT / Explor cells. Sunfunkits.com
Milwaukee M18 18-Volt Lithium-Ion XC Starter Kit with One 5.0Ah Battery and Charger 48-59-1850 - The Home Depot