Pic 1: Wagan vehicle-to-vehicle quick jumper connects between power outlets of both vehicles, charges the dead battery in a few minutes without having to connect to either battery. New in package...$15...GRC4
Pic 2: Schauer 6 Amp 6/12 Volt automatic battery charger, works well...$15...GB3b
Pic 3: Schumacher 6/2 Amp 6/12 Volt charger, works well...$15
Pic 4. Schumacher SC5212A 2/10/50 12 Volt fully automatic battery charger: trickle-charges at 2Amp, normal charge at 10 Amps, and jump starts at 50 Amps. Made in U.S.A. $35...GB1b
Pic 5: Standard-duty 12' jumper cables: 8-gauge, good clamps...$10...Rafb