NOCO GENIUS5 vs GENIUS10

Pick by the battery. NOCO rates the GENIUS5 to recharge up to 120 Ah and the GENIUS10 up to 230 Ah. On a battery both can handle, the GENIUS10 takes half the time: about 7.5 hours against 15 for 100 Ah from half charge.

Checked against sources on by the TrueAmps editorial team.

NOCO GENIUS5 smart battery charger with clampsNOCO GENIUS5NOCO GENIUS10 smart battery charger with clampsNOCO GENIUS10
Manufacturer ratings from each maker's spec page and listings from the Intertek directory. Bold marks the higher rating (lower for weight).
SpecGENIUS5GENIUS10
Charge current5 A10 A
Recharges up to120 Ah230 Ah
Battery voltages6 / 12 V6 / 12 V
Lithium modeYesYes
Weight1.5 lb3.33 lb
Safety listingUL 1236UL 1236

Choose the GENIUS5 if

Your batteries are 120 Ah or smaller.

See NOCO GENIUS5 on Amazon

Choose the GENIUS10 if

You charge batteries larger than 120 Ah, or want the shorter wait.

See NOCO GENIUS10 on Amazon

Questions people ask

Do I need a 10 amp charger for a car battery?

Not by NOCO's ratings: the 5 A GENIUS5 is rated for batteries up to 120 Ah. The 10 A GENIUS10 halves the time and covers up to 230 Ah.

All comparisons