YONHAN 20A 12V/24V LiFePO4 Battery Charger
$95
Key Specs
| output | 20A |
| voltage | 12V / 24V |
| battery-types | LiFePO4, AGM, Gel, Flooded |
| weight | 3.6 lbs |
| dimensions | 11 x 5 x 4 in |
| warranty | 2 years |
Pros
- ✓ Dedicated LiFePO4 mode with correct lithium charging voltages
- ✓ 20A output charges 100Ah lithium batteries in approximately 5 hours
- ✓ Dual 12V/24V voltage support for flexible system compatibility
- ✓ LCD screen shows voltage, current, and charging progress
Cons
- ✗ Heavier than comparable NOCO options
- ✗ Fan can be loud at peak 20A output
Detailed Review
Fast Charging Built for Lithium Batteries
The shift to LiFePO4 lithium batteries in RVs, boats, and off-grid systems has created demand for chargers that go beyond slapping a lead-acid profile on lithium cells and calling it compatible. The YONHAN 20A charger is explicitly designed for LiFePO4 chemistry with a dedicated mode that uses the correct 14.4–14.6V absorption voltage and 13.6V float for 12V lithium systems — values that protect cell longevity rather than the slightly lower voltages intended for AGM batteries.
At 20 amps, this charger delivers meaningful speed for LiFePO4 users. A 100Ah lithium battery discharged to 20% can be fully recharged in approximately five hours — useful when camping with shore power access or when back at the dock between trips. Compared to a 10A charger, the time savings add up quickly for users who charge frequently.
Multi-Chemistry Flexibility at Two Voltages
Beyond LiFePO4, the YONHAN 20A handles AGM, gel, and flooded lead-acid at both 12V and 24V. The 24V support is particularly valuable for users with 24V lithium battery banks wired in series, or for marine and heavy equipment applications where 24V starting systems are standard. The voltage and chemistry mode selections are managed through the front panel, with the LCD confirming the active configuration before charging begins.
The charging sequence includes bulk, absorption, and float stages with automatic transitions between each. An active fan cools the internal components during the high-current bulk phase; the fan speed is thermally controlled, but at full 20A output it runs consistently enough to be audible in quiet spaces.
Who It’s For
The YONHAN 20A charger targets the growing community of LiFePO4 adopters — van lifers, RV owners, boat owners, and off-grid cabin builders — who want a fast, chemistry-correct charger without paying a significant premium for a name-brand equivalent. The dual-voltage support and honest lithium charging profile make it a strong value for users whose primary battery is LiFePO4 but who also maintain older AGM batteries in other vehicles. For users who need the absolute fastest charge times, a 25A+ unit would reduce time further, but 20A covers the majority of real-world charging windows comfortably.
