2025 test13 productsJump Starters & Car Power
Which Car Battery Charger Brand Wins?
We compared 13 car battery charger options head to head. NOCO Genius 5 came out on top. See the measured results, the runner-up, the budget pick, and a link to the full test video. Shoppers cross-shopping auto battery charger, automotive battery charger, car battery chargers and car battery trickle charger land here for the head to head that settles it.
Winner
NOCO Genius 5
Price shown in test: $30
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Budget pick
NOCO Genius 1
Price shown in test: $30
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The measured results
Every number below is read straight from the test. Scroll sideways to see all measurements. Products are listed in the order they finished.
| Product | ColdStart(dead battery, ~10V) | ChargingTest(1V to full) | Spark Test | Operating Temp | Float Voltage | Reverse Polarity |
|---|---|---|---|---|---|---|
| 1HECHOBO$10 | powered up, on standby, not charging, 0W energy use | began charging around 10V, peaked at around 27W (just over 2A, matches its 2A rating) | created a lot of sparks, one of 4 brands that sparked | 155F, hottest of all 13 chargers tested | overcharging above 15V (15.1V per closing summary), continues supplying current past full, no true float mode | FAILED, threw a spark and the charger was ruined when connected to the wrong terminals |
| 2MOTOPOWER$20 | powered on, idle draw ~0.5W, not charging at 1V starting point | began charging around 8.46V, peaked at just under 26W (just over 2A versus its claimed 1.5A rating) | did a great job avoiding sparks | 140F, running warm | shows full at 14.1V but still supplying about 2.4W, ramps up output when voltage drops | not tested |
| 3NEXPEAK 6 amp$20 | idle draw ~0.5W when plugged in unconnected; once connected does not recognize the battery, even in pulse repair mode | began charging at 1V, peaked around 91W (about 7.6A, better than its 6A rating) | not tested | 94F, kept cool by an internal fan | shows full at 13.9V but still delivering about 7W, adds more current when voltage drops | not tested |
| 4NEXPEAK 1.75 amp$20 | 0W idle, still 0W once connected, did not detect the battery initially | came to life around 2.5V (about 10W, under 1A) early on; stopped charging at just over 7V because it had defaulted to 6V mode; required a manual switch to 12V, after which it rose to about 22.6W | not tested | 130F | shows full at 14.8V, still supplying charge; narrator calls 14.8V clearly overcharged | not tested |
| 5Sweter$24 | idle draw ~0.72W; no override or force-charge option, so it could not begin charging the fully dead battery | started charging around 3V; the charger's own amp display appeared inaccurate versus measured energy use; peaked at about 86W (about 6A, matching its claimed 6A rating even though its own display read closer to 3.5A) | generated a lot of sparks, one of 4 brands that sparked | 83F, kept cool by an internal fan | showed full with less than 1W draw, reacted properly to a forced voltage drop | not tested |
| 6Black+Decker$24 | display draws about 0.5W but no indicator lights show power-on; not charging | slow to start, began charging around 9V, peaked at almost 18W (about 1.5A, matches its rated 1.5A) | did a great job suppressing sparks | 118F, warm | shows full at 13.9V, still supplying about 6W, reacted properly to voltage drop | not tested |
| 7NOCO Genius 1$30 | powered on with ~0.15W idle draw; first charger to begin charging the fully dead battery, using its force-charge mode (press and hold mode button 7 seconds) | began charging near 1V, energy fluctuated 4 to 5W until 6V, peaked at about 13.3W (about 1.1A, matches its 1A rating) | did a great job suppressing sparks | close to 100F | finished at about 13.1V, on target, reacted properly to voltage drop | not tested |
| 8GOOLOO$40 | powered on with about 0.5W draw; battery was too dead for it to begin charging initially | began charging just over 3V as advertised; stopped unexpectedly around 9V and needed a disconnect/reconnect to resume; peaked just over 60W (about 5A versus its claimed 4A rating) | did a great job, spark-free | around 100F | showed full at 13.3V, cycled back on properly once the voltage drop began | not tested |
| 9Hulkman$45 | idle draw about 1.18W; not able to charge the fully dead battery from a cold start | began near 1V, stayed under 10W until 11V then jumped to about 78W peak (about 6.5A versus its rated 5A) | did a great job suppressing sparks | 73F, coolest of all 13 chargers, credited to its internal fan | should be finished around 13.6 to 13.8V but kept supplying current; still reacted properly to a forced voltage drop | not tested |
| 10ECO-WORTHY$50 | idle draw about 1.3W; not able to charge the fully dead battery | began near 1V, single digits until 7V then rose to about 79W peak (about 6.6A versus its rated 5A) | produces sparks, one of 4 brands that sparked | 112F | supplying about 2W at 13.6V, reacted properly to voltage drop | not tested |
| 11NOCO Genius 5$70 | set up like the Genius 1, able to charge the fully dead battery using force-charge mode | active indicator near 1V, single digits until 7V, peaked at about 72W (about 6A versus its rated 5A) | performed just as well as Genius 1, no sparks | around 105F | finished around 13.3V, topped off, reacted properly to voltage drop | not tested |
| 12Battery Tender$70 | powered up but unable to detect or charge the fully dead battery | slower to start than Hulkman, Eco-Worthy, and NOCO, kicked in around 3V, under 10W until 10V, peaked about 63W (about 5.25A versus its rated 4A) | performed well, no sparks | 70F | completed at 13.1V, on target, reacted well to voltage drop | not tested |
| 13CTEK$90 | unable to detect or charge the fully dead battery, same limitation as Battery Tender | most ambitious at low voltage of all chargers tested, over 20W at 3V, over 50W at 10V, peaked about 65W (about 5.4A versus its rated 4.3A) | delivered on its spark-free claim, no sparks | 144F, warm | finished at 13V with about 0.5W draw, increased output properly on voltage drop | not tested |
How it was tested
- cold start test on a completely dead battery (starting around 10V)
- charging performance test on a badly drained but healthy battery from about 1V to full
- spark-free connection test
- operating temperature during charging
- float charge voltage and response to a forced voltage drop
- reverse polarity protection safety test
“If I had to choose just one charger, I'd definitely go with the Noco Genius 5.”