Boost Air AX65 Jump Starter vs Avid Power 4000A Jump Starter

The Avid Power is the stronger pick for most shoppers: 4000A peak, up to 10.0L diesel support and 60 jumps per charge beat the NOCO's 2000A, 6.0L diesel and smaller 31.8Wh battery. The NOCO Boost Air AX65 is the more compact, better-known unit, and its 100 PSI inflator and 35-inch tire rating cover most passenger cars and light trucks. Owners of both brands praise easy starts on V6 and V8 engines; the Avid Power's higher output suits big diesel trucks, while the NOCO's smaller body and simpler controls suit occasional use.

• Choose the Boost Air AX65 if you want a compact, proven-brand unit for gas engines up to 8.0L and tires up to 35 inches, and you value a smaller footprint over raw jump power.
• Choose the Avid Power 4000A if you need to start large diesel engines up to 10.0L, want many jumps per charge, and want a higher-pressure inflator and a brighter light in one kit.