CTEK CS Free, 12V Jump Starter Alternative, Adaptive Booster, Portable Battery Charger, Smart Battery Maintainer, 4-in-1 Charger Power Bank, Solar Power Bank for Car, Phone, Computer

All-in-one Solution: Power up flat batteries and keep your vehicle batteries in peak condition.
Adaptive Booster: Say goodbye to jump cables and jump starter packs. CS FREE powers up your flat battery quickly and is completely safe for your battery and vehicle electronics.
Charge and Maintain: Whether you're connected to mains power, or going off-grid, CS FREE keeps your 12V lead-acid or lithium (LiFePO4) battery in peak condition.
Off-grid Charging: Utilize solar energy or a separate leisure battery to power the CS FREE, enabling you to charge vehicle batteries while far away from the power grid.
Hi-Tech Power Bank: No power? No problem. Charge up your laptops, smartphones, tablets and cameras whenever they need it with USB-A and USB-C ports.
Countdown indicator: No guesswork needed - the ‘countdown’ indicator clearly shows when you can restart a flat battery, and how long there is to go before the battery is fully charged.