The SPERAS i4 is a versatile multi‑slot charger built for enthusiasts and professionals needing to charge several batteries at once. It allows charging up to 4 batteries simultaneously, giving you full control over each slot. One slot can deliver up to 2 A, making it ideal for faster charging of your primary cell.
It supports a wide range of battery types including Li‑ion (21700, 18650, 16340, 14500, etc.) as well as Ni‑MH / Ni‑Cd cells. The charger intelligently selects between charging modes (CC, CV, or dV/dT), terminates charging automatically when complete, and includes protections such as reverse polarity, short circuit, and overcharge prevention. It also supports revival of over‑discharged Li‑ion batteries.
With a USB‑C input (5V / 2A), it’s portable and easy to power from power banks or USB adapters. Its robust thermal design ensures stable operation during use.
Key Features:
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4 independent charging slots
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Up to 2 A charging current in one slot
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Supports Li‑ion, Ni‑MH, Ni‑Cd
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Intelligent charging modes (CC, CV, dV/dT)
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Auto termination when charge complete
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Protections: reverse polarity, short circuit, overcharge
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Revives over‑discharged Li‑ion batteries
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USB‑C input (5V / 2A)
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Compact and efficient thermal design
Specifications Table:
| Specification |
Details |
| USB Input |
5V / 2A |
| Output Voltage |
4.2V |
| Output Current per Slot |
1 A × 2 slots; 2 A × 1 slot; 0.5 A × 4 slots |
| Compatible Batteries |
21700, 26650, 18650, 16340, 14500 (Li‑ion) + Ni‑MH / Ni‑Cd |
| Dimensions (L × W × H) |
110 × 48.4 × 28.9 mm |
| Weight |
107.2 g (net) |
| Protection Features |
Reverse polarity, short circuit, overcharge, etc. |
