Molicel INR21700-P42A 4200mAh 45A 21700 Battery 8-Pack with XTAR VC8 8-Slot LCD Charger – Extreme High-Output Power Reserve for Professional Production Crews, Search & Rescue Units & High-Intensity Field Operations

Why This Bundle

The Molicel P42A is one of the strongest 21700 cells available — a 4200mAh typical capacity paired with a genuine 45A continuous discharge rating and a very low AC impedance (<15mΩ), making it a favorite for high-drain battery pack builds that need serious current without sacrificing runtime. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Molicel INR21700-P42A batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.

Molicel INR21700-P42A Specifications

Important: Molicel positions the P42A as a pack-only, high-power cell intended for use within a properly engineered battery management system (BMS) — not as a standalone consumer replacement cell for casual devices.

This is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.

The Charger: XTAR VC8

• Type-C input with QC3.0 support: up to 3A on a single bay when battery resistance is low enough — the closest match here to the P42A's 4.2A standard charge current, though still below it
• 5 adjustable current levels: 3A×1 / 2A×2 / 1A×4 / 0.5A×8 / 0.25A×8 — manually selectable to match your charging needs
• 8 independent charging slots: each bay monitored and controlled separately
• Real Capacity Test (Grading Mode): on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate
• Storage Mode: charges or discharges batteries to their rated storage voltage to maximize battery lifespan
• Smart Battery Type Detection: automatically identifies the battery and selects the optimal charging strategy
• VA LCD Display: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot
• Multiple Safety Protections: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells
• Built from fire-retardant PC/ABS material, with a built-in "Three-Stage Lithium Battery Charging System" (Patent No. 201720828840.6)

XTAR VC8 – Supported Battery Types & Voltage

Compatible with 3.6V/3.7V Li-ion/IMR/INR/ICR batteries, including the Molicel P42A (21700) in this bundle:

10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650

Also compatible with 1.2V Ni-MH/Ni-Cd batteries: AAAA, AAA, AA, A, SC, C

End-of-charge voltage: 4.20±0.05V (Li-ion) / 1.45±0.1V (NiMH) · End-of-charge current: <120mA

Compatibility Notes

The VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the P42A's ~70–70.2mm length. Given this is a high-power cell with a demanding 4.2A rated charge current, the VC8 won't match the P42A's full rated charge speed even on a single slot, but manually selecting the higher current levels (up to 3A on one slot) gets meaningfully closer than the default 0.5A-per-slot setting used when all 8 bays are occupied.

What's Included

• Molicel INR21700-P42A Battery × 8
• XTAR VC8 Charger × 1
• USB-A to USB-C Charging Cable × 1
• User Manual × 1

Safety Tips

• Store batteries in a proper case, keeping them away from loose metal objects to prevent short circuits
• Never disassemble, puncture, burn, or submerge the batteries
• Charge only with a genuine, compatible charger such as the XTAR VC8
• The P42A is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS — do not use it as a standalone replacement cell in casual consumer devices
• Never discharge below 2.5V or charge above 4.2V

FAQ

Q: Can the XTAR VC8 charge Molicel P42A batteries safely? A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P42A cells, with independent monitoring on each of its 8 slots — though it won't reach the cell's full 4.2A rated charge speed.

Q: Is the P42A meant for use in standalone devices like flashlights? A: Molicel positions the P42A as a pack-only cell intended for use within a properly designed battery management system, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, EVs/PHEVs, and engineered high-drain battery packs.

Q: Will 21700 batteries fit properly in the VC8? A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the P42A's length.

Q: Can I charge all 8 batteries at the same time? A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.

Q: How do I test if a P42A battery has lost capacity? A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.

Q: Does the VC8 require a special power adapter for fast charging? A: For the fastest speeds (2A/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.

Q: What's in the box? A: 8 Molicel INR21700-P42A batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.