NOCO GENIUS10 battery charger
The GENIUS10 charges at 10 amps and NOCO rates it to recharge batteries up to 230 Ah. At the same battery size it takes half as long as the GENIUS5.
Checked against sources on by the TrueAmps editorial team.
- Charge current
- 10 A
- Battery voltages
- 6 V / 12 V
- Recharges batteries up to
- 230 Ah
- Lithium (LiFePO4) mode
- Yes
- Weight
- 3.33 lb
- Safety listing
- UL 1236
Ratings are the manufacturer's own, from NOCO's spec page, checked September 24, 2026. Safety listing: ETL (Intertek), directory record, checked September 24, 2026.
See NOCO GENIUS10 on Amazon (paid link)
Battery size it is rated to recharge
When 10 amps is worth it
For a single car battery the GENIUS5 is usually enough. The GENIUS10 pays off with big batteries: a 100 Ah deep-cycle battery at half charge takes about 7.5 hours at 10 A, against 15 at 5 A, by NOCO's charge-time ratio.
NOCO lists 6 V and 12 V lead-acid and lithium LiFePO4 support. Note that its spec page does not list CA (calcium) among the types, which the GENIUS1, 2 and 5 pages do.
How long the GENIUS10 takes
Estimated hours from half charged to full, using the charge-time ratio in NOCO's own manuals. How the estimate works.
| Battery | From 50% | From flat |
|---|---|---|
| 10 Ah | 45 min | 1.5 h |
| 20 Ah | 1.5 h | 3.0 h |
| 35 Ah | 2.6 h | 5.3 h |
| 50 Ah | 3.8 h | 7.5 h |
| 70 Ah | 5.3 h | 11 h |
| 100 Ah | 7.5 h | 15 h |
Nearest chargers in the range
| Model | Amps | Up to Ah | Lithium |
|---|---|---|---|
| NOCO GENIUS10 | 10 | 230 | Yes |
| NOCO GENIUS5 | 5 | 120 | Yes |
All battery chargers side by side
Head to head: GENIUS5 vs GENIUS10
GENIUS10: questions people ask
GENIUS5 or GENIUS10?
Pick by battery size. NOCO rates the GENIUS5 up to 120 Ah and the GENIUS10 up to 230 Ah. For one car battery the GENIUS5 does the job; for big deep-cycle or marine banks the GENIUS10 recharges in half the time.
Check the GENIUS10 listing on Amazon (paid link)