Jacobs Digital

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www.jacobsdigital.co.nz

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SPERAS i4 4 Slot Charger 21700

SKU: SL-i4

SPERAS i4 4 Slot Charger 21700
SPERAS i4 4 Slot Charger 21700
SPERAS i4 4 Slot Charger 21700
SPERAS i4 4 Slot Charger 21700

Our Price

$45.99

$45.99


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About this product

SPERAS i4 smart 4-slot battery charger for Li-ion, Ni-MH and Ni-Cd rechargeable batteries. Supports 21700, 26650, 18650, 16340, 14500 and other compatible cells. Features 4 independent charging slots, clear LED indicator bars, USB 5V/2A input, up to 2A fast charging in the fourth slot, automatic CC/CV/dv/dt charging modes, reverse polarity protection, short circuit protection, over-discharged battery activation, heat dissipation vents and automatic charging termination.
4 Slots • LED Indicators • Up to 2A Fast Charging
SPERAS i4 Smart LED 4-Slot Battery Charger

The SPERAS i4 is a streamlined 4-slot smart battery charger for users who need simple, reliable charging across common flashlight battery sizes. It features clear LED indicator bars, 4 independent charging slots, automatic intelligent charging modes, and up to 2A fast charging through the dedicated fourth slot.

SPERAS i4 4-slot smart battery charger with LED indicator bars
4 Slots Independent Charging
5V / 2A USB Input
2A Max Fast Charge Slot
107.2g Net Weight
Available Features

The i4 is designed as a simple, practical charger for rechargeable Li-ion, Ni-MH and Ni-Cd batteries. Each slot is controlled independently, so different compatible cells can be charged at the same time. The LED indicator bars show charging status without needing a complex display.

  • 4 independent charging slots.
  • Clear LED indicator bars for charging status.
  • Dedicated fourth slot supports up to 2A fast charging.
  • Compatible with Li-ion, Ni-MH and Ni-Cd rechargeable batteries.
  • Supports common flashlight battery sizes including 21700, 26650, 18650, 16340 and 14500.
  • Automatic intelligent charging modes: CC, CV and dv/dt.
  • Over-discharged Li-ion battery activation function.
  • Automatic termination when charging is complete.
  • Reverse polarity protection.
  • Short circuit protection.
  • Cooling vents for heat dissipation.
SPERAS i4 charger loaded with multiple rechargeable batteries and charging cable
Technical Specifications
Specification Detail
Model SPERAS i4
Product Type Smart LED 4-slot battery charger
Charging Slots 4 independent slots
Display Type Clear LED indicator bars
USB Input 5V / 2A
DC Output DC 4.2V / 1A × 2, or 2A × 1, or 0.5A × 4
Fast Charging Up to 2A through the dedicated fourth slot
Charging Modes Automatic CC, CV and dv/dt charging modes
Compatible Battery Chemistry Rechargeable Li-ion, Ni-MH and Ni-Cd batteries
Common Compatible Battery Sizes 21700, 26650, 18650, 16340, 14500 and other compatible rechargeable cells
Li-ion Battery Compatibility Listed on Charger 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650
Ni-MH / Ni-Cd Battery Compatibility Listed on Charger AAAA, AAA, AA, A, SC and C rechargeable batteries
Low-Voltage Battery Activation Yes, over-discharged Li-ion battery activation function
Charging Completion Automatic termination when charging is complete
Reverse Polarity Protection Yes
Short Circuit Protection Yes
Heat Dissipation Cooling vent design
Dimensions 110mm length × 48.4mm width × 28.9mm height
Net Weight 107.2g
Gross Weight 146g
Recommended Use Charging compatible rechargeable flashlight batteries at home, in a gear kit, travel kit, workshop or outdoor kit
Battery safety note: use only compatible rechargeable batteries. Do not attempt to recharge non-rechargeable cells.
SPERAS i4 charger underside showing cooling vents and printed specifications
What’s in the Box
Included Item Quantity Details
SPERAS i4 Battery Charger 1 Smart LED 4-slot rechargeable battery charger
Charging Cable 1 USB charging cable for powering the charger from a suitable USB power source
Carrying Pouch 1 Included pouch for storage or transport
User Manual 1 Operating and product information
SPERAS i4 battery charger box contents with charger, cable, manual and retail packaging
4-Slot • LED Display • Multi-Chemistry Charging
A simple 4-slot charger for common rechargeable flashlight batteries.

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