Battery Tender Power Tender 8 A vs NOCO GENIUS10: Which to Buy

The NOCO GENIUS10 is the better battery charger overall, rated 3.5 to 2.5. The NOCO GENIUS10 leads on features, value and charge current. The NOCO GENIUS10 costs $10.08 less ($99.87 vs $109.95).

Higher rated

NOCO GENIUS10

#8 in Over 5 A3.5Full review

A strong pick for anyone charging car, truck, boat or RV batteries regularly: fast, full featured and still able to maintain a battery for months.

Amazon $99.87

$99.87

Battery Tender Power Tender 8 A

#16 in Over 5 A2.5Full review

A good garage charger for 12 V car and truck owners who want quick recharges plus a supply for battery swaps.

Amazon $109.95

$109.95

Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Choose the NOCO GENIUS10 for features (lithium mode, temperature compensation, repair mode, power supply mode vs power supply mode), value ($9.99 per amp ($99.87, 10 A) vs $13.74 per amp ($109.95, 8 A)) and charge current (10 A vs 8 A).

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every over 5 A battery charger; a clear win is highlighted. How we rank explains each one.

Factor weight	NOCO GENIUS10	Battery Tender Power Tender 8 A
Overall rating	3.5/5	2.5/5
Value 35%	55 $9.99 per amp ($99.87, 10 A)	39 $13.74 per amp ($109.95, 8 A)
Charge current 20%	12 10 A	0 8 A
Features 25%	100 lithium mode, temperature compensation, repair mode, power supply mode	25 power supply mode
Warranty 20%	50 3-year warranty	50 3-year warranty

Independent measurements

NOCO GENIUS10

Tested by	Current	Charge time	Conditions
Budget Light Forum (HKJ)	10 A	-	Reviewer measured “basically 10A” of charge current on his sample; battery size and state of charge not stated.