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Rectangular black charger unit with front display and cable connections

NShi

NShi 20A 12V/24V Smart Battery Charger

SKU CH-AEK1-H82HH

A 20A smart charger maintains and repairs 12V and 24V lead-acid and LiFePO4 batteries with seven-stage charging, pulse desulfation and winter/summer modes

  • FeaturesAutomatic, Portable, Trickle
  • 20A rapid charge for 12V and 10A for 24V batteries
  • 7-stage smart charging protects LiFePO4 and lead-acid types
  • Pulse repair breaks sulphation to restore ageing cells
  • Winter and summer modes adapt rate to temperature shifts
  • 100-240V input with reverse, over-current and short-circuit safeguards

20A Smart Charger for 12V and 24V Batteries

This automatic charger delivers 20 amps at 12 volts and 10 amps at 24 volts. It charges, maintains and repairs lead-acid and LiFePO4 batteries found in cars, trucks, boats, motorcycles and garden equipment. The unit runs from a 100-240V supply and includes winter and summer modes that adapt the charge rate to temperature. It is not a jump starter and requires a mains outlet to operate.

Upgrade from Slower Automatic Chargers

The 20-amp output at 12 volts is much faster than 10-amp or 6-amp automatic chargers, cutting the time needed to bring a depleted battery back to usable capacity. The seven-stage programme adds a pulse-repair step that can reduce sulphation on older or idle cells, restoring some lost performance. The jump is worth it when you service multiple vehicles or need a single unit that handles both 12-volt and 24-volt systems without swapping leads.

Suits Owners of Mixed 12V and 24V Fleets

This charger suits workshops, farms or households that run cars, trucks, boats, ATVs, lawn mowers and forklifts with both voltage standards. Buyers who want a portable jump starter should look elsewhere because the unit must stay plugged into an outlet. Users who only ever charge small 12-volt powersport batteries may find the 20-amp rate more than they need.

Highlights

  • 20A rapid charge for 12V and 10A for 24V batteries
  • 7-stage smart charging protects LiFePO4 and lead-acid types
  • Pulse repair breaks sulphation to restore ageing cells
  • Winter and summer modes adapt rate to temperature shifts
  • 100-240V input with reverse, over-current and short-circuit safeguards

Specifications

BrandMetra
FeaturesAutomatic, Portable, Trickle

Questions about this item

What voltage input does the charger require from the wall outlet?

The charger accepts an input of 100-240V AC, so it works with standard household and garage sockets worldwide without a separate adapter.

Which battery terminals do I connect first, and what does the reverse-protection feature do?

Connect the red clamp to the positive terminal and the black clamp to the negative terminal; the built-in reverse-protection circuit prevents damage if the clamps are accidentally swapped.

How do I keep the cooling system working effectively over time?

Periodically wipe the ventilation slots clean of dust and debris so the internal cooling fan can move air freely during extended charging sessions.

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