How C/10 charger sizing works
Amp-hours, overnight lead-acid shopping current, and when to stop at NO_MATCH.
Battery charger sizing
Smart battery charger amp class from battery Ah
Enter battery capacity in amp-hours. Get the smallest 8, 20, or 35 A smart-charger class from a C/10 starting current — or NO_MATCH when the ladder cannot cover it.
Battery charger sizing
Result
Required A ≈ battery_ah ÷ 10 (C/10 overnight lead-acid shopping rule). Classes: 8 · 20 · 35 A. Confirm chemistry and voltage; not a BMS/WPS. Above 35 A required → NO_MATCH.
From measurement to decision
Open the full calculator
Same tool with room for examples.
8 vs 20 vs 35 A classes
When each VEVOR smart-charger class fits — and when none do.
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